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JP2013017150

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2013017150
Abstract: A front and back sound can be identified by using an inner-type handset and a single
ear sound that can distinguish between front and back sounds and enable clear and natural
hearing sounds, and at the same time binocular hearing sounds resolve the localization in the
head. The present invention provides a receiver that can reproduce the sound field. SOLUTION: A
receiver using means for emitting a sound wave with a sound wave emission axis 51, 52
indicating a sound wave emission direction of a sounding body directed to a partial side wall of
the ear canal realizes a receiver with high sound quality and outside localization did.
Furthermore, a plurality of sounding bodies 56, 57 are provided for one ear, and the sound
waves are emitted toward the different predetermined portions of the wall of the ear canal by the
plurality of sound emission axes 51, 52 respectively. It became possible, and it became possible
to use inner type surround headphones and hearing aids and stethoscopes that are easy to hear
the sound you want to hear. [Selected figure] Figure 5b
Earpiece for canal type receiver, canal type receiver using the same, and stethoscope and hearing
aid using the canal type receiver
[0001]
The present invention relates to an earpiece of an inner type handset and an inner type handset
such as earphones, headphones, surround headphones, noise canceling headphones, portable
game consoles, handsets for 3D game consoles, handsets for 3D TVs, mobile communication
devices, aircraft simulators, It is suitable for a fighter fighter simulator, a hearing aid, a
stethoscope including an electronic stethoscope, an acoustic device used in an aircraft, a portable
acoustic device, and the like.
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[0002]
Receivers are used in many hearing devices for listening to sounds.
It is a headphone in which the receiver is incorporated in a cover made to cover the ear, and a
plug-like one in which the receiver itself is directly inserted into the earhole is an earphone or an
inner-type receiver. It is also used for telephone devices such as mobile phones, and sound
information collected by a receiver after the sound collected from a microphone is electrically
amplified. A receiver is used to store a speaker or other sound producing body in a housing, and
radiate the sound wave of the sound producing body into the auricle, the ear canal opening and
the ear canal. The use of an inner handset requires an earpiece. In the headphones, literatures
utilizing ear function are often found.
[0003]
JP, 2010-287927, JP, 2010-268038, JP, 2006-222962, JP, 2005-117, 594 (patent publication
2006-246415).
[0004]
Single ear hearing in a conventional inner-type handset (hearing with only one ear, also referred
to as monaural hearing) is unclear and unnatural, especially headphones, earphones, telephones
using earphones (including mobile phones), in particular In hearing aids, there are also people
who are difficult to use due to unnatural hearing.
Even in the case of binaural sound, it can not be said that the problem of in-head localization in
which the sound is produced in the head has not been solved. Also, no distinguishable handsets
have been presented for the sound from above and from below.
[0005]
[Patent Document 3] and [Patent Document 4] have been disclosed for solving in-head
localization. Also, the conventional hearing aid has a problem that it is difficult to distinguish
between the sound that one wants to hear and the sound that one does not want to hear. The
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purpose of the present application is to enable discrimination of front and back sounds by using
an inner-type handset that enables reproduction of a sound field spanning back and forth with
only one ear sound, and clear and natural hearing sound can be obtained. It is possible to present
a receiver capable of reproducing front and back sounds by using an inner-type handset and a
one-ear noise that resolves localization, a handset capable of reproducing sound fields ranging up
and down, a stethoscope utilizing the handset, and a hearing aid easy to hear is there.
[0006]
The sounding body used in the inner type handset according to the present invention is a
speaker or other electro-acoustic transducer, or in the case of a stethoscope, a tip projecting from
a cavity forming a diaphragm of a chest piece or a dome-shaped closed sound collecting portion
A sound emission port at the other end of the sound guide tube connected to a substantially
cylindrical sound conduit emitting sound from the sound source is also included as a chest piece
type sound generator.
[0007]
A substantially cylindrical sound conduit provided for sound emission in a housing containing a
sound generator is referred to as a housing sound conduit, and a sound generator housed in a
housing having a housing sound conduit is referred to as a sound generator unit.
The earpiece described below is an earpiece having a tubular portion in which a pipe or a sound
conduit fitted in the housing sound conduit is embedded, which is connected to one end of the
tubular portion and is provided outside the cylindrical portion. You may have the umbrellashaped part extended like an umbrella shape so that it may cover. Unless otherwise specified, the
cross-sectional views of the present earpiece and the receiver are all cross-sectional views as
viewed from above, and the front view is a front view as viewed from the tympanic membrane
side.
[0008]
The sound wave emission axis is shown by an example using a speaker as a sound generator in
FIG. 1 (a), and an axis connecting the center of the sound generator 10 for converting a
sonoelectric signal to a sound wave and the center of the sound wave in the traveling direction of
the generated sound wave It is referred to as the sound wave emission axis 11, and the arrow
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indicates the traveling direction of the sound wave. Also, when connecting a sound conduit to the
sound generator unit, the cross section of the sound conduit that emits the sound wave of the
other end of the sound conduit connected to the sound generator is referred to as sound
emission cross section (b) 12 and one sound conduit is one sound generation The complex
connected to the body unit is hereinafter referred to as a sound conduit sounder. Reference
numeral 13 in FIG. 1 (b) shows the sound wave emission axis of the sound conduit sounding
body when the sound pipe is bent, from the center of the sound wave emission section to the axis
perpendicular to the sound wave emission section. It is the figure which removed the umbrellalike-part part of the earpiece of the tubular part outer periphery connected with the housing
sound conduit in order to understand easily. Reference numeral 14 denotes a sound generator
unit, 17 denotes a sound conduit connected to the housing sound conduit, and 19 denotes a
housing sound conduit.
[0009]
FIG. 1 (c) is a schematic cross-sectional view of an example of an inner type handset which is a
part of the present invention. In the inner type handset provided with the sound conduit shown
in FIG. 1 (c) 16 in the earpiece tubular part (hereinafter referred to simply as connection) fitted
and connected to the housing sound duct in the inner type handset, the housing sound duct 15
and the earpiece tubular part The sound conduits, or the sound conduits connected to the
housing sound conduits, are the same in function and hence both will be hereinafter collectively
referred to as intra-tube sound conduits. An axis connecting the center of the sound wave
emission cross section 12 of the in-tube sound conduit to the center of the sound wave in the
traveling direction of the generated sound wave is referred to as a sound pipe sound wave
emission axis 13 and is indicated by 18 in FIG. Arrows indicate the direction of sound waves.
Hereinafter, since both the sound wave emission axis and the sound conduit sound wave
emission axis indicate the sound wave emission direction, both are collectively referred to as a
direction sound wave emission axis.
[0010]
FIG. 2 shows a cross-sectional view of the head on the surface of the ear canal. FIG. 2 (a) shows
the central axis 21 (b) of the earpiece inserted into the ear canal center 23 of the ear canal
portion 23 into which the tip of the earpiece is inserted or the earpiece central axis 22 (b)
inserted into the external ear canal of the conventional inner type handset 26; Is the pinna. The
central point of the present invention is that the central axis of the ear canal at the site where the
inner handset is inserted into the ear canal and the direction sound emission axis of the sound
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producing unit of this inner handset are not parallel to each other. In the sound generator unit
indicated by reference numeral 301 and 302 in FIG. 3B, the sound wave emission axis of the
sound generator unit is directed to a part of the wall of the ear canal to emit a sound wave. 306
is a sound conduit in the pipe.
[0011]
When the sound wave is emitted with the direction sound wave emission axis of the sounding
body unit directed to a part of the wall of the ear canal, the difference in the part of the wall of
the ear canal that is emitted causes a difference in the way of sound wave transmission to the
tympanic membrane. It turned out that it becomes information of the arrival direction of sound
which is one. That is, it was found that when the direction sound wave radiation axis is directed
to different parts of the ear canal wall and sound waves are emitted, they can be perceived as
incoming sound waves from different directions, and the improvement of sound quality is also
achieved. This is the discovery of a new ear canal function. Once the sound wave is reflected on
the wall of the ear canal, it is assumed that the sound wave efficiently reaches the tympanic
membrane and the sound quality is improved.
[0012]
FIG. 3 is a cross-sectional view of the head in the ear canal. As shown in (a), when the tip of the
earpiece in the inner handset is inserted into the ear canal as shown in (a), the direction sound
wave emission axis 301 of the sound generator unit is directed to the side wall 303 on the
forehead side of the ear canal As sound, as shown in FIG. 3B, when sound waves are emitted
toward the side wall 304 on the occipital region of the external auditory canal as the sound wave
emission axis 302 of the sound generator unit, it can be perceived as a rear sound. Reference
numeral 305 in FIG. 3 denotes the central ear canal axis. FIG. 4 is a longitudinal cross-sectional
view of the ear canal of the head, and as shown in FIG. 4A, when sound waves are emitted with
the direction sound wave radiation axis 402 directed to the upper surface 404 of the ear canal,
FIG. It was found that when sound waves are emitted with the direction sound wave emission
axis 401 directed to the lower surface 403 of the ear canal as in the above), the sound is
perceived as sound from the lower direction. 405 and 406 indicate intraductal sound conduits,
and 400 indicate auricles. The side wall on the forehead side of the ear canal as used herein is
the side wall of the nose side of the ear canal, and the side wall on the back of the ear canal is the
side wall of the back of the ear canal.
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[0013]
Therefore, if the structure of an inner type handset using an earpiece provided with an in-tube
sound conduit so as to emit a sound wave so that the direction sound wave emission axis of the
sound generator unit is directed to a predetermined ear canal wall part, sound coming from a
desired direction It is possible to provide an inner-type handset that can be heard as Accordingly,
in a hearing device in which a sound conduit is inserted into the ear canal and the sound wave is
transmitted to the eardrum, the sound wave can be heard as coming from a desired direction by
emitting the sound wave with the direction sound wave radiation axis of the sound pipe directed
toward the predetermined ear canal wall. It can provide devices and handsets.
[0014]
By thus emitting the direction sound wave emission axis of the sound generator unit to a part of
the wall of the ear canal, the direction of the incoming sound can be recognized and the sound
can be localized outside the head, and a high-quality sound can be obtained. In addition,
localization in the forward direction than in-head localization can also be effective in enhancing
localization resolution because it can be heard in a wider sound field.
[0015]
The earpiece has a sound conduit disposed in the earpiece so that sound waves are emitted
toward the side wall on the forehead side of the ear canal at the site of the ear canal where the
tip of the earpiece is inserted. We call it an earpiece.
[0016]
A receiver in which a sound producing unit is connected to a front sound earpiece is hereinafter
referred to as a front localization receiver, and if one pair of left and right is used, it becomes an
inner type stereo receiver for stereo localization with forward localization.
The same effect can be obtained by extending the housing sound conduit instead of the sound
conduit in the earpiece and substituting the sound conduit in the front sound earpiece.
Also, the earpiece in which the sound conduit is disposed in the earpiece so as to emit sound
waves toward the occipital wall of the ear canal at the site of the ear canal where the tip of the
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earpiece is inserted The handset in which the sound producing unit is connected to the rear
sound earpiece is hereinafter referred to as a rear localization receiver. If a receiver provided
with a front localization receiver and a rear localization receiver is used, the front and back sound
fields can be reproduced.
[0017]
The receiver using the earpiece is provided with two sound conduits of the first sound conduit
and the second sound conduit in the earpiece, and the direction sound emission axis of the first
sound conduit is in front of the ear canal at the ear canal site where the tip of the earpiece is
inserted The earpiece is disposed in the earpiece so as to emit sound waves toward the side wall
on the head side, and the direction sound wave radiation axis of the second sound conduit is
directed to the side wall on the back side of the ear canal at the ear canal site where the tip of the
earpiece is inserted The earpiece disposed in the earpiece so as to emit a sound is referred to as a
front / back sound earpiece, and the sound producing unit containing the first sound producing
unit is the first sound producing unit, and the housing sound conduit and the first sound conduit
of the first sound producing unit The sound generator unit containing the second sound
generator as the second sound generator unit, and the receiver connecting the housing sound
conduit of the second sound generator unit and the second sound conduit Identification becomes
a before and after the sound field reproduction handset capable of after. This is hereinafter
referred to as front and rear sound field receiver. In this case, the first sound producing unit is a
sound producing unit for forward sound, and the second sound producing unit is a sound
producing unit for rear sound. Hereinafter, the sounding body unit in charge of the front sound
will be referred to as a front sounding body unit, and the sounding body unit in charge of the
rear sound will be referred to as a back sounding body unit.
[0018]
The same effect can be obtained as a substitute for the first sound conduit or the second sound
conduit in the earpiece by extending the housing sound conduit of the sound generator unit
instead of the first sound conduit and the second sound conduit in the earpiece. By making the
second sound conduit in the earpiece longer than the first sound conduit and delaying the sound
wave from the sound generator unit connected to the second sound conduit to reach the
tympanic membrane, the sound wave emitted from the second sound conduit is indirect Sound
effects are obtained, the front localization becomes clearer, and the resolution is improved. For
example, coiling a part of the second sound conduit is also effective to secure the delay time.
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[0019]
If this front and rear sound field receiver is used, the front and back sound fields can be
reproduced even in the case of a single ear heard using a receiver with only one ear receiver. FIG.
5 (a) is a front view of the front and rear sound field receiver for the right ear, in which 58
indicates a sound emission port for forward sound and 59 indicates a sound emission port for
rear sound. FIG. 5 (b) is a cross-sectional view of the front and rear sound field receiver for the
right ear. 54 is a front sound in-pipe sound conduit, 55 is a rear sound in-pipe sound conduit, 56
is a front sound generator unit, and 57 is a rear sound generator unit. FIG. 5A is a mounted
cross-sectional view of the front and back sound field receiver in the ear canal. 506 is a central
axis of the ear canal, 507 is a tragus, 508 is a pair of wheels, 504 is a sound pipe for forward
sound, and 505 is a sound pipe for back sound.
[0020]
If a pair of left and right front and rear sound field receivers capable of reproducing the front and
rear sound fields are provided, it becomes an inner type handset capable of surround
reproduction.
[0021]
As shown by the vertical cross section in the ear canal of FIG. 4, the sound emission of emitting
sound waves toward the upper wall 404 of the ear canal at the ear canal site where the tip of the
earpiece is inserted The receiver of the type using the body unit is hereinafter referred to as the
upper localization receiver, and the direction sound wave emission axis 401 of the sounding
body is directed to the lower wall 403 of the ear canal at the ear canal site where the tip of the
earpiece is inserted as shown in FIG. A receiver of a type using a sound generator unit emitting a
sound wave will be hereinafter referred to as a lower localization receiver.
It is possible to distinguish the upper and lower front and rear sound fields by adding the two
types of sounding body units constituting the upper localization receiver and the lower
localization receiver to the front and rear sound field receivers.
[0022]
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The earpiece shown in FIG. 8 is a right ear earpiece in which four sound conduits of a first sound
conduit 85, a second sound conduit 86, a third sound conduit 87, and a fourth sound conduit 88
are disposed in an earpiece cylindrical portion 806. It is a schematic diagram in which four
sound producing units are connected to the four sound conduits, and the sound conduit sound
emission axis of the first sound conduit is directed to the upper wall of the ear canal, and the
sound conduit sound emission axis of the second sound conduit is The sound conduit sound
emission axis of the third sound conduit is directed to the lower wall of the ear canal, and the
sound conduit sound emission axis of the fourth sound conduit is directed to the side wall on the
back of the ear canal. The earpiece which has a structure of the cylindrical part which arrange |
positioned four sound conduits is shown, and this earpiece shall be called an up-and-down front
and rear sound earpiece hereafter, The 1st sounding body unit which stored the sounding body
for upper sound in the 1st sound conduit. The second sound generator connected to the 84 and
the forward sounding body in the second sound conduit A receiver connected with the body unit
81, connected with the third sound producing unit 83 containing the lower sound producing
body to the third sound conduit, and connected with the fourth sound producing unit 82
containing the rear sound producing body to the fourth sound conduit If it does, it will become a
receiver which can identify the direction of the arrival sound from up, down, front and back
direction. Hereinafter, this handset is referred to as the upper and lower front and rear sound
field handset.
[0023]
Also, instead of the sound conduit in the earpiece tube, the housing sound conduit of the sound
generator unit can be extended to substitute the first sound conduit or the second sound conduit
or the third sound conduit or the fourth sound conduit. Be
[0024]
The fourth sound conduit of the upper and lower front and rear sound earpieces and the rear
sound generator unit connected to the fourth sound conduit are omitted to be referred to as the
upper and lower front sound earpieces, and the upper and lower front sound earpieces for the
right ear are shown in FIG. A schematic perspective view is shown.
The three sound conduits of the first sound conduit 2501, the second sound conduit 2502, and
the third sound conduit 2503 are disposed in the earpiece tube, and the sound conduit sound
emission axis of the first sound conduit is to the upper wall of the ear canal, the second The
sound conduit sound emission axis of the sound conduit is directed to the forehead side of the
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ear canal, and the sound sound emission axis of the third sound conduit is directed to the lower
wall of the ear canal, and three sound conduits are arranged in the earpiece tube A sound
generator unit 2504 containing an upper sound generator is connected to a first sound conduit
as an earpiece, and a sound generator unit 2505 containing a front sound generator connected
to a second sound conduit is connected to a third sound conduit If it is a receiver connected to a
sound generator unit 2506 containing the above, it becomes a right-ear upper and lower front
sound receiver capable of identifying the direction of the incoming sound from the upper and
lower front directions. (B) shows the upper and lower front sound receiver for the left ear. These
handsets are hereinafter referred to as upper and lower front sound field handsets. Also, instead
of the sound conduits in the earpiece tube, the housing sound conduits of the respective sound
producing units can be extended to substitute for the first sound conduit or the second sound
conduit or the third sound conduit of the earpieces to obtain a similar effect. . Hereinafter, a
sound producing unit containing a forward sound producing body is referred to as a front sound
producing unit, and a sound producing unit containing a rear sound producing body is referred
to as a rear sound producing unit.
[0025]
The direct sound described below is the sound that is input to the ear in the shortest time from
the sound source of the sound you want to hear, and the indirect sound is directly after the
sound wave from the sound source is reflected once by the surrounding environmental objects. A
sound that is input to the ear after a longer time than the sound.
[0026]
In the inner type handset, N (N is an integer of 2 or more) sound conduits are provided in the
cylindrical portion of one earpiece, and the incident angles of the direction sound emission axis
of the N sound conduits in this earpiece with respect to the ear canal sidewall By connecting N
sound producing units corresponding to the respective sound conduits, it becomes possible to
input sound source direction information from the same number of different directions as the
number of the sound conduits in the earpiece tube to the tympanic membrane.
That is, it is an N-channel handset capable of discriminating in the N direction. FIG. 6 shows a
schematic cross-sectional view of an example of the front three channel receiver for the right ear
when N = 3. 601 indicates a first channel sound generator unit, 602 indicates a second channel
sound generator unit, 603 indicates a third channel sound generator unit, 604, 605 and 606
indicate directional sound wave emission axes, and 607 is an earpiece An umbrella portion 611
indicates an N1 sound conduit, 612 indicates an N2 sound conduit, and 613 indicates an N3
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sound conduit.
[0027]
If the sound generator unit connected to the shortest sound conduit among the N sound conduits
is used for direct sound and the other sound generator units are used for indirect sound, highquality, realistic sounds with forward sound localization can be heard . The sound channel
radiation axis of the direct sounding sound producing unit is disposed in the earpiece so that the
earpiece emits sound waves toward the frontal side wall of the ear canal. In natural listening,
direct sound and innumerable indirect sounds that you want to hear come from many directions,
up, down, left, right, and back, and the sound is input to the eardrum, so if you increase the
number of N more natural listening It is possible to get closer to
[0028]
Of the multiple sounding units, the sounding unit connected to the shortest sound conduit in the
earpiece is the sounding unit in charge of the direct sound, and the sounding unit connected to
the sound conduit other than the shortest sound conduit is the sounding in charge of the indirect
sound Body unit. The indirect-sounding sound producing unit becomes a receiver with higher
sound quality if it is driven by an audio signal obtained by delaying the audio signal for driving
the direct sound producing unit by a predetermined time. In order to generate the delay time, the
length of the sound conduit connected to the indirect sound charge sound source unit may be
various lengths or a predetermined delay time may be generated by an amplifier with a delay
time generation device to generate the indirect sound sound generation unit You can drive it. The
delay processing device described below refers to a device for delaying for a predetermined time
after adjusting the signal level of the electrical signal. Also, the receiver means a device including
a receiver and an amplifier for driving the receiver.
[0029]
One example is shown in the block diagram of FIG. 9, assuming that the audio signal of the right
or left channel is the direct sound in the stereo configuration and is the audio signal 1, and FIG. 9
(a) shows an amplifier for N indirect delay with different delay processors. FIG. 9 (b) shows the
case where the right channel is the direct sound audio signal 1, the left channel is the audio
signal 2, and the left channel is the audio signal 1 in FIG. 9 (b). The case where the channel is an
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audio signal 2 and the input signal of an amplifier with a different delay processing device for N
indirect noises is an audio signal 2 is shown. With such a configuration amplifier, it becomes
stereo headphones capable of natural listening. The reason is that the indirect sound reflected by
the environmental condition should be input to the left and right ears with a time difference. N is
a natural number.
[0030]
The forward sounding body refers to the sounding body responsible for sound wave radiation of
the sound source coming from the front when listening, and the backward sounding body refers
to the sounding body responsible for sound wave emission of the sound source coming from the
back when sounding. I assume. Similarly, the upper sounding body is a sounding body in charge
of sound wave radiation of the sound source coming from the upper direction at the time of
listening, and the lower sounding body is in charge of sound wave emission of the sound source
coming from below at the sounding time. It is assumed that the pronunciation body.
[0031]
A plurality of sound conduits are connected to one sound producing unit to form a sound
emission axis of a plurality of sound conduits or one sound conduit is connected to one sound
producing unit as shown in FIG. The main sound conduit is further divided into a plurality of
branches, and the branched sound conduit is also referred to as a branched sound conduit 102.
Since the branched sound conduit is also a sound conduit, the sound emission axis of each
branched sound conduit It has been found that each has a function as one independent sound
emission axis. Reference numeral 104 denotes a sound generator unit, and 105 denotes a
housing sound conduit. As shown in FIG. 10, the directional sound emission axes of the plurality
of branched sound conduits may be arranged to emit sound waves to the target ear canal wall
after crossing.
[0032]
The sound emission axis of this branched sound conduit is hereinafter referred to as branched
sound conduit sound emission axis 103, including the main sound conduit and branched sound
conduit as a multi-branched sound conduit, and this multi-branched sound conduit is an earpiece
tube. The earpiece provided in the stem is referred to as a branched sound conduit earpiece. The
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same effect can be obtained by extending the housing sound conduit 105 instead of the sound
conduit in the earpiece tube and replacing the multi-branch sound conduit.
[0033]
Even if the lengths of the branched sound conduits are the same, clear listening sounds can be
obtained, but if the lengths of the branched sound conduits are different from each other, the
shortest branched sound conduit among the branched sound conduits is for direct sound As a
branch sound conduit sound emission axis is arranged toward the forehead side wall of the ear
canal at the site of the ear canal where the tip of the earpiece is inserted, the other branch sound
conduit sound emission axes are different from each other for indirect sound If placed at a wall, it
can be heard as a more natural forward sound. The branched sound conduit and the main sound
conduit are collectively referred to as a forward sound branched sound conduit earpiece.
[0034]
By using the branch sound conduit earpiece, it is possible to input one direct sound and indirect
sound from multiple directions to the tympanic membrane by changing the length of the branch
sound conduit even from one sound generator unit. The sound generator unit connected to the
main sound conduit having a plurality of branched sound conduits is hereinafter referred to as a
multi-sound emission axis sound generator unit. FIG. 7 (a) shows a schematic view of an example
of three branched sound conduits. (A) is a cross-sectional view, (b) is a front view seen from the
tympanic membrane side. 71 is a tonal conduit, and 73 and 74 are bifurcated conduits having an
indirect sound effect with a delay time for the direct sound branching conduit of 72. Therefore, it
is possible to use one multi-sound emission axis sound source unit as a receiver if it has multiple
sound wave information coming from multiple directions as if it has a sound emission axis
composed of sound generation units as many as the branch sound conduits. The input can be
transmitted to the tympanic membrane.
[0035]
Even if the lengths of the branched sound conduits are the same, clear listening sounds can be
obtained, but if the lengths of the branched sound conduits are different from each other, the
shortest branched sound conduit among the branched sound conduits is for direct sound As the
branch sound conduit sound emission axis is arranged toward the back wall side wall of the ear
canal at the site of the ear canal where the tip of the earpiece is inserted, the other branch sound
conduit sound emission axes are used for indirect sound on different ear canal walls The
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arrangement for directing, including the branch sound conduit and the main sound conduit
connected thereto, will be referred to as a rear sound branch sound conduit earpiece.
[0036]
Also, by changing the length of each of the branched sound conduits, an acoustic wave radiation
axis is generated that emits sound from multiple directions and after a large number of delay
times as compared with a sounding unit that does not have branched sound conduits. If a
receiver using this multi-sound emission axis sound generator unit can be heard including a large
number of indirect sounds, an effect of being able to hear a three-dimensional, high-rising, highquality sound is produced.
[0037]
The earpieces having branched sound conduits of different lengths are hereinafter referred to as
delay branched sound conduited earpieces, and in FIG. 31 (a), a longer delay time is generated by
coiling a part of the branched sound conduit for the right ear. FIG. 1 shows a schematic view of a
delayed branch sound piped earpiece.
Reference numeral 3101 denotes a connection port with the sound producing unit, 3103 denotes
a direct sound wave emission port, and 3104 denotes an indirect sound wave emission port.
[0038]
The shortest sound conduit in the earpiece is a first sound conduit, and the earpiece having
sound conduits for generating different delay times of N lengths (N is a natural number) longer
than the first sound conduit is an earpiece with a DN sound conduit ( DN indicates D for delay
and N indicates the number of sound conduits, and the shortest sound conduit is referred to as a
first sound conduit and is a direct sound conduit.
The other delay sound conduits are generically referred to as D-tubes, and in the case of having
one or more D-tubes, the individual delay sound conduits are DN sound conduits (N is a natural
number) to identify D-tubes; It shows that it has one delay sound conduit, and D2 shows the
second delay sound conduit.
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[0039]
FIG. 31 (b) shows an earpiece with a D1 sound conduit in which a part of one sound conduit for
generating a delay time is coiled, 3102 is a first sound conduit, 3105 is a D1 sound conduit, and
an indirect sound generator is produced. The connection port with the unit is shown, 3103 is a
direct sound wave emission port, and 3104 is a sound emission port of the D1 sound conduit. (A)
and (b) show only the shape of the sound conduit in the earpiece to make it easy to understand.
The dashed line 3100 shows the earpiece umbrella.
[0040]
FIG. 13 (a) is a schematic diagram of a portion 134 of the ear canal. The incident angle of the
directional sound emission axis 137 with respect to the sagittal plane with respect to the sagittal
plane 135 passing through the point where the directional sound emission axis of the sounding
body unit intersects the ear canal wall is the sagittal plane incident angle 131. In a single
housing, assuming that the incident angle of the directional sound emission axis 137 with
respect to the cross section 136 passing through the point where the directional sound emission
axis intersects the ear canal wall is the cross sectional axis incident angle 132 Directional sound
emission axis or multiple sound emission axis of multiple sound generator units with the tip of an
earpiece having multiple sound generator units housed and connected to multiple sound
generator units inserted into the ear canal Body sound branches of the sound unit are directed to
different ear canal wall parts, or sagittal plane incidence angle or cross-sectional axis incidence
even for the same ear canal wall part Arrival wave information from multiple directions by is
disposed in the earpiece so that the different angles can be transmitted to the eardrum. If the
receiver is made up of a plurality of sound generator units having different sound emission units
having different sound emission axes or incident angles of the sagittal plane axis or the cross
sectional axis, sound information from more directions can be input to the eardrum.
[0041]
The first multibranched sound conduit and the second multibranched sound conduit are disposed
in one earpiece, and the tip of the earpiece is inserted into the branched sound conduit sound
emission axis of the shortest branched sound conduit of the first multibranched sound conduit
The ear canal is located on the forehead side wall of the ear canal, and the shortest branch sound
conduit of the second multi-branch sound conduit is the branch sound conduit sound wave
10-05-2019
15
emission axis at the ear canal site where the tip of the earpiece is inserted The main sound
conduit of the first multibranched sound conduit is referred to as the first main sound conduit,
and the main sound conduit of the second multi branched sound conduit is referred to as the
second main sound conduit, and the earpiece is It will be referred to as a conduit earpiece. An
inner-type handset in which a direct sounding sound producing unit is directly connected to the
first ton of the multi-branched sound conduit earpiece and an indirect sounding sound unit is
connected to the second ton becomes a more natural listening ability.
[0042]
The front and rear multi-branch sound conduit earpieces connect the sound generator unit for
the previous sound to the first main sound conduit for surround reproduction and connect the
sound generator unit for the rear sound to the second main sound conduit for more natural
surround sound listening It becomes.
[0043]
In the inner handset, a convex is placed between the sound emitting end face (12 in FIG. 1) of the
sound conduit in the earpiece tube and the housing sound conduit of the sound producing unit
connected to the sound conduit or in the housing sound conduit. For example, it can function as
an acoustic reflection diffuser having the function of an acoustic diffuser and / or an acoustic
reflector.
FIG. 12 (a) is a schematic cross-sectional view of the acoustic reflection diffuser 123 provided in
the housing sound conduit, and FIG. 12 (b) is a schematic cross-section of the acoustic reflection
diffuser 124 provided in the sound conduit of the earpiece tube. Figure shows. (C) is a front view
of FIG. 12 (b) when the earpiece with a sound reflection diffuser for the right ear is viewed from
the tympanic membrane side; 125 is a sound reflection diffuser stump; 126 is a sound emission
port; 120 is an earpiece It is an umbrella-like part.
[0044]
The shape of the acoustic reflection diffuser having the function of the acoustic diffuser and / or
the acoustic reflector is such that the acoustic wave 122 emitted from the sound generator is
transmitted to the acoustic diffuser and / or the acoustic reflector as shown in FIG. The shape
may be any shape that is uniformly reflected and diffused to a predetermined target ear canal
10-05-2019
16
wall. The diffused sound wave has the same function as the innumerable sound wave radiation
axes 121, and the effect of more natural hearing appears.
[0045]
The effect of the sound wave diffuser and the sound wave reflector is that the sound heard does
not become an exciting sound, and natural and soft sound can be heard. Naturally arriving sound
should be transmitted to the wall of the ear canal from multiple directions including indirect
sound, and if an acoustic diffuser and acoustic reflector are arranged, the sound wave is diffused
and emitted to the target ear canal wall Therefore, it is effective to bring it closer to natural
sounds. The effect is remarkable especially at high tones. The acoustic diffuser or the acoustic
reflector may constitute a projection on a portion of the inner surface of the sound conduit of the
earpiece tube or a portion within the housing sound conduit. The material and the shape should
just reflect an acoustic wave. A support piece extending from the sound emitting end of the
sound conduit may be formed, and a sound diffuser or a sound reflector may be disposed on the
support piece away from the earpiece sound emitting end from the eardrum. As an alternative to
the acoustic reflection diffuser, as shown in FIG. 5 (c), the inner shape of the sound conduit may
be horn-shaped to be diffused and emitted to the wall of the ear canal targeted for sound. The
reference numeral 510 shows the shape of the lumen connected to the housing sound conduit,
and the reference numeral 509 shows the lumen shape of the sonic radiation port. FIG. 5 (d)
shows the sound emission port of the front and rear sound field receiver having a horn shape
and the lumen shape seen from the tympanic membrane side, and 514 shows a sound emission
port for forward sound and 515 shows a sound emission port for backward sound. .
[0046]
Also in the tube type (sound conduit type) stereo earphone used in the passenger seat of the
aircraft, there was a defect that only the unnatural sound localized in the head could be heard.
The sound tube sound emission axis of the tube in the earpiece to be inserted into the ear canal
by utilizing the principle of the front localization receiver of the present invention also in the
tube type stereo earphone used in the passenger seat of the aircraft at the ear canal site where
the tip of the earpiece is inserted If a sound guide tube is disposed in the earpiece tube so as to
emit a sound wave toward the side wall on the forehead side of the ear canal, the sound
localization made forward localized becomes possible. The sound guide tube disposed in the
earpiece tube in this manner is referred to as a front localization tube, and a receiver using this is
referred to as a front localization tube receiver. It becomes a tube-type stereo earphone that can
be localized forward by using this as a pair.
10-05-2019
17
[0047]
Earpiece tube for emitting sound waves toward the side wall on the occipital side of the ear canal
at the site of the ear canal where the tip of the earpiece is inserted. By arranging the sound
conduction tube in the ring-shaped portion, it is possible to perform the rear-sided listening.
Earpieces in which both front and rear stereotactic tubes are disposed in a single earpiece tube
are referred to as front and rear sound field tube earpieces, and a receiver using this front and
back sound field tube earpiece is referred to as front and back sound field tube receiver. The
front and back sound can be heard by using the front and back sound field tube receiver.
Surround reproduction becomes possible if it is used by the left and right pair. Also, for the rear
sound, the front sound tube that guides the sound from the front sound generator unit using the
front and rear sound earpieces in surround playback is connected to the first sound conduit of
the front and rear sound earpieces, and the sound from the rear sound generator is guided The
tube may be connected to the second sound conduit of the front and back sound earpiece.
[0048]
In a stethoscope having an earpiece which can also be applied to a stethoscope, a state unit of
the stethoscope and a sound conduction tube connected to the state unit, a sound conduction
tube for the left ear and a sound conduction tube for the right ear The sound quality of the
forward-localized high-quality sound can be obtained by connecting the fore-end portion of the
two branched tubes to the front sound earpiece of the present invention or the earpiece with
delay branch sound conduit 31 1 (a) 3101 A stethoscope capable of auscultation can be
configured.
[0049]
Of the tubes branched into two for binaural use in the above stethoscope, the left ear sound
conduction tube is further branched into the left front sound conduction tube and the left rear
sound conduction tube, and similarly the right ear sound conduction tube The left front sound
conduction tube is branched into the right front sound conduction tube and the right rear sound
conduction tube, and the left front sound conduction tube is the first sound conduit of the left
front / rear sound earpiece or the left Connect to the first sound conduit with the D1 sound
conduit and the right front sound conduction tube to the first sound conduit of the right front
and rear sound earpieces or the first sound conduit of the right D1 sound conduit with the left
rear sound The guiding tube is connected to the second sound conduit of the left front / rear
sound earpiece or the D1 sound conduit of the left or right delayed sound guiding earpiece, and
the right rear sound conduction tube is connected to the second sound conduit or left of the right
10-05-2019
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front / back sound earpiece When the sound conduction tube is connected to the D1 sound
conduit of the left delayed sound conduit earpiece, it is connected to the D1 sound conduit of the
right delayed sound conduit earpiece, and the left rear sound conductive tube is attached with
the right delayed sound conduit When connected to the D1 sound conduit of the earpiece, a
clearer auscultation sound can be heard by connecting it to the D1 sound conduit of the left
delayed sound conduit-equipped earpiece.
[0050]
As shown in FIG. 34, in order to secure a longer delay time instead of the D1 sound conduit, front
and back sound earpieces are used, and a portion of the left rear sound guide tube 3408 and the
right rear sound guide tube 4309 are coiled. good.
3406 is a left front sound conduction tube, 3407 is a right front sound conduction tube.
[0051]
The stereo stethoscope also has a chest piece that divides the cavity forming the sound collection
part closed by the vibrating film into two right and left divisions at the center, and a tube that
emits sound from the tip protruding from each of the two divided left and right cavities The
chestpiece is referred to as a stereo chestpiece, and the left channel is connected to the left
channel and the other end of the left channel is connected to the left frontal earpiece. Connecting
the right sound conduction tube to the sound conduit of the right cavity, and connecting the
other end of the right sound conduction tube to the right front sound earpiece, becomes a
stethoscope capable of stereo auscultation with forward localization.
[0052]
In the above stereo stethoscope, the left ear sound conduction tube is further branched into the
left front sound conduction tube and the left rear sound conduction tube, and the right ear sound
conduction tube is similarly divided into the right front sound conduction tube and the right rear
sound conduction tube. The left front sound conduction tube is the first sound conduit of the left
front and rear sound earpieces or the first sound conduit of the left delayed sound conduit with
earpieces The right front sound conduction tube is connected to the first sound conduit of the
right front and rear sound earpiece or the first sound conduit of the right delayed sound conduit
earpiece, and the left rear sound conduction tube is connected to the left front and rear sound
earpiece The right rear sound conduction tube is connected to the D1 sound conduit of the two
sound conduit or the left or right delayed sound conduit with earpiece, and the second sound
10-05-2019
19
conduit of the right front and rear sound earpiece is connected to the left delayed sound
conduction tube. When connected to the D1 sound conduit of the equipped earpiece, connect it
to the D1 sound conduit of the right delayed earpiece with the delayed sound conduit, and
connect the left rear sound conduction tube to the D1 sound conduit of the right delayed
earpiece with the sound conduit If it is, connect it to the D1 sound conduit of the left delayed
earpiece with earpiece.
[0053]
In order to obtain a longer delay time instead of the earpiece D1 sound pipe with delay sound
pipe, parts of the left and right rear sound pipes are coiled.
A schematic external view is shown in FIG.
The left rear sound conduction tube with delay effect is connected to the second sound conduit
of the right front and rear sound earpiece, and the right rear sound conduction tube is connected
to the second sound conduit of the left front and rear sound earpiece This produces an effect that
the front localization becomes clearer and the left and right sound image localization become
clearer.
[0054]
As a stethoscope utilizing upper and lower frontal earpieces or upper and lower frontal and
rearal earpieces, a cavity forming a sound pickup portion closed by a vibrating membrane is
divided by a partition member which divides four from the center vertically and horizontally, The
whole chestpiece provided with a cylindrical sound conduit for emitting sound from the tip
projecting from each is referred to as a 4-divided chestpiece, and FIG. 27 (b) is a view of the
vibrating membrane from the test subject side. The vibrating membrane 2701 of the first cavity,
the vibrating membrane 2702 of the second cavity, the vibrating membrane 2703 of the third
cavity, and the vibrating membrane 2704 of the fourth cavity around it, as shown in FIG. It may
be rotated 45 degrees right or left around the center of the piece.
In this case, when looking at the vibrating membrane from the test subject side, the first cavity
2701, the second cavity 2702, the third cavity 2703, and the fourth cavity 2704 are referred to
10-05-2019
20
as four-divided 45 chest pieces clockwise from the top.
[0055]
FIG. 33 (a) is a schematic view of a 45-piece 45-piece chestpiece viewed from the top of the other
side of the vibrating membrane 3301 is the sound conduit of the first cavity and the first sound
conduit and 3302 is the sound conduit of the second cavity. A sound conduit 3303 is a sound
conduit of the third cavity, a third sound conduit, and a sound conduit of the fourth cavity is a
fourth sound conduit, which will be referred to as a fourth sound conduit. FIG. 33 (b) shows the
cavity seen from the lower left with the vibrating membrane removed, and the cavity 3305 is the
first cavity, 3309 is the sound inlet of the first cavity, 3306 is the second cavity, 3307 is the third
cavity, 3308 is the fourth cavity 3310 are sound inlets of the fourth cavity, and 3311 is a
partition member.
[0056]
By using the upper and lower front earpieces and the 45-piece chestpiece, it is possible to clearly
determine the forward localization and the movement of the auscultation sounds in the upper,
lower, left and right. A sound conduction tube is connected to the sound conduit of the first
cavity of the 4-split 45 chest piece, this sound conduction tube is branched into two, and each is
connected to the first sound conduit of the upper and lower front sound earpieces for the left ear
and the right ear Connected to the sound conduit of the second cavity and the second sound
conduit of the upper and lower front sounding earpieces of the left cavity, and the sound
conduction tube connected to the sound conduit of the third cavity; It is connected to the third
sound conduit of the upper and lower frontal earpieces for the ear and the right ear, and is
connected to the sound conduit of the fourth cavity and the second sound conduit of the upper
and lower frontal earpieces on the right.
[0057]
If the upper and lower front and rear sound earpieces shown in FIG. 8 are used, the auscultation
of clearer localization of the upper and lower sound fields and the left and right sound fields
becomes possible, so identification of the auscultation sound vertical and horizontal localization
and discrimination of the auscultation sound movement direction are also possible. . That is, in a
stethoscope using upper and lower front and rear sound earpieces and using a 45 split chest
10-05-2019
21
piece, the sound conduction tube connected to the sound conduit of the first cavity is branched
into two and the respective upper and lower front and rear sound earpieces first sound conduit
The sound conduction tube connected to the sound conduit of the third cavity is branched into
two and the sound conduction tubes connected to the sound conduits of the fourth cavity are
connected to the left and right front and rear sound earpiece triphones respectively A sound
guide tube which is branched into the right branch sound guide tube 1 and the right branch
sound guide tube 2 having the same or longer length as the right branch sound guide tube 1 and
the right branch sound guide tube 1 and is similarly connected to the sound conduit of the
second cavity The left branch sound conduction tube 1 and the left branch sound conduction
tube 1 are branched into two, the left branch sound conduction tube 2, and the right branch
sound conduction tube 1 is the right upper and lower front and rear sound earpiece Second The
left branch sound conduction tube 1 is connected to the conduit, the left and right front and rear
sound earpiece second sound conduit is connected, and the right branch sound conduction tube
2 is connected to the left upper and lower sound earpiece fourth sound conduit and The branch
sound conduction tube 2 is connected to the right and left front and rear sound earpiece fourth
sound conduit. Alternatively, the right branch sound conduction tube 2 may be connected to the
right upper and lower front and rear sound earpiece fourth sound conduit, and the left branch
sound conduction tube 2 may be connected to the left upper and lower front and rear sound
earpiece fourth sound conduit.
[0058]
The two sound conduits of the first sound conduit and the second sound conduit are disposed in
the earpiece, and at the site where the earpiece is inserted into the ear canal, the sound emission
axis of the first sound conduit faces the forehead sidewall of the ear canal and has a cross section
The sound emission axis of the second sound conduit is directed to the anterior forearm side wall
of the external auditory canal with respect to the cross section, the sagittal plane and the coronal
plane at approximately 45 degrees with respect to the sagittal plane and the coronal plane. An
earpiece disposed at an angle of about 45 degrees and directed obliquely downward is referred
to as upper and lower 45 earpieces. Fig. 35 (a) is a front view of the upper and lower 45
earpieces for the right ear viewed from the tympanic membrane side, 3501 indicates the sound
emission port of the first sound conduit, 3502 indicates the sound emission port of the second
sound conduit (b) In the front view of the upper and lower 45 earpieces for the left ear viewed
from the tympanic membrane side, reference numeral 3503 indicates the sound emission port of
the first sound conduit, 3504 indicates the sound emission port of the second sound conduit, and
(c) is upper and lower 45 earpieces for the left ear The direction of the sound wave emission axis
3505 of the first sound conduit and the sound wave emission axis 3506 of the second sound
conduit as viewed from the front view is shown. The first sound conduit and the second sound
conduit are disposed at an angle of about 45 degrees with respect to the cross-section, the
10-05-2019
22
sagittal plane, and the coronal plane in both directions of the sound wave radiation axis.
[0059]
FIG. 36 shows a schematic perspective view of the upper and lower 45 handsets in which the
first sound producing unit is connected to the first sound conduit of the upper and lower 45
earpieces and the second sound emitting unit is connected to the second sound conduit. (A)
Upper and lower 45 handsets for right ear, 3601R: first sound conduit of upper and lower 45
earpieces, 3603R: first sound producing unit, 3602R: second sound conduit of upper and lower
45 earpieces; 3604R: second sound emitting unit, b) Left and right upper and lower 45 handsets
for the left ear, 3601L: first sound conduit for upper and lower 45 earpieces, 3603L: first sound
producing unit, 3602L: second sound conduit for upper and lower 45 earpieces, 3604L: second
sound emitting unit, 3600 The upper and lower 45 earpieces are cylindrical, and 3605 are the
upper and lower 45 earpieces.
[0060]
The first sound conduit of the four-piece chestpiece and the first sound conduit of the upper and
lower 45 earpieces on the left are connected by a sound conduction tube, and the second sound
conduit of the four-piece chestpiece and the second sound of the upper and lower 45 earpieces
on the left Connect the conduit with the sound guide tube, connect the third sound conduit of the
4-piece chestpiece and the second sound conduit of the upper and lower 45 earpieces with the
sound guide tube, and connect the fourth sound conduit of the 4-piece chestpiece with the right
By connecting the first sound conduction of the top and bottom 45 earpieces with a sound
conduction tube, a stethoscope capable of auscultating the sound field in the upper, lower, left
and right can be configured, and the effect is localization of the auscultation sound in the upper,
lower, left, right and identification of movement of the auscultation sound Is possible.
[0061]
As a chestpiece for an electronic stethoscope, a 4-piece chestpiece without a projecting sound
conduit is referred to as a closed 4-piece chestpiece, and a 4-piece 45 chestpiece without a sound
conduit is referred to as a closed 4-piece 45 chestpiece. Will be used.
[0062]
If the electric signal from the sound collection microphone disposed in the state unit of the
electronic stethoscope is amplified by an amplifier and the left and right front localization
receivers are driven, it becomes possible to hear the auscultation sound localized in front.
10-05-2019
23
[0063]
In addition, an electric stethoscope is used to amplify the electric signal from the sound collection
microphone placed in the state unit of the stethoscope using an anteroposterior sound field
receiver by an amplifier to drive the left and right front sound generator units, and at the same
time the sound collection If the output from the microphone is input to an amplifier with a delay
generating device for a predetermined time and the rear sound generator unit of the front and
rear sound field receiver is driven by the output, a clearer auscultated auscultation sound can be
heard.
[0064]
In the case of a stereo electronic stethoscope, the chest piece divides the cavity forming the
sound pickup portion closed by the vibrating film into two left and right at the center, and the
right microphone is disposed in each of the divided right cavities. The left microphone is
arranged, the electric signal from the left microphone is amplified by the amplifier 1, the left
front localization receiver is driven, the electric signal from the right microphone is amplified by
the amplifier 2, and the right front localization receiver is It becomes a stereo electronic
stethoscope that can hear high-quality auscultation sound localized forward when driven.
[0065]
A stereo electronic stethoscope that uses front and rear sound field receivers and divides a cavity
forming a sound pickup portion closed by a vibrating membrane in a chest piece into two left and
right divisions in the center, and microphones for the left in each divided left cavity The electric
signal from the left microphone is amplified by the amplifier 1 to drive the left forward sound
generator unit, the right microphone is arranged in the right cavity, and the electric signal from
the right microphone is amplified by the amplifier 2 Drive the right front localization receiver,
and simultaneously input an electrical signal from the left microphone to the amplifier 1 with a
predetermined delay processor, and input an electrical signal from the right microphone to the
amplifier 2 with a predetermined delay processor, The output of amplifier with delay processing
unit 1 is output to the right rear speaker unit or left rear speaker unit, and the output of amplifier
with delay processor 2 is output to the right of amplifier with delay processor 1 Output to the left
rear speaker unit when outputting to the left speaker unit, and output to the right rear speaker
unit when the amplifier with delay processing device 1 outputs to the left rear speaker unit It
becomes a stereo electronic stethoscope with a clear localization.
[0066]
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24
If the electronic stethoscope using the closed quadripartite chestpiece and the upper and lower
45 handsets is used, a high-quality electronic stethoscope with excellent sound source
localization can be provided by further clear sound field reproduction.
Using a closed four-piece chestpiece, place the first microphone in the first cavity, the second
microphone in the second cavity, the third microphone in the third cavity, and the fourth
microphone in the fourth cavity from the first microphone Upper and lower 45 receivers to drive
the sound generator unit 3603 L of FIG. 36 (b), and the second microphone amplifies the electric
signal from the second microphone to drive the sound generator unit 3604 L The electric signal
from the third microphone is amplified by the third amplifier to drive the sound generator unit
3604R in FIG. 36 (a), and the electric signal from the fourth microphone is amplified by the
fourth amplifier and FIG. 36 (a) Drive the sound generator unit 3603R.
[0067]
Similarly, the first microphone is in the first cavity, the second microphone in the second cavity,
the third microphone in the third cavity, and the fourth microphone in the fourth cavity using the
closed four-quarter 45 chestpiece and the upper and lower front earpieces. To amplify the
electric signal from the first microphone by the first amplifier and drive the sound generator unit
2504 of FIG. 25 (a) and the sound generator unit 2510 of FIG. 25 (b) to generate the second
electric signal from the second microphone. 25 (b) is amplified by the amplifier to drive the
sound generator unit 2511 in FIG. 25 (b), and the electric signal from the third microphone is
amplified by the third amplifier and sound generator unit 2506 in FIG. 25 (a) The same effect can
be obtained even if the body unit 2512 is driven and the electric signal from the fourth
microphone is amplified by the fourth amplifier (right) to drive the sound generator unit 2505 of
FIG. 25 (a).
[0068]
If the upper and lower front and rear sound field receiver of the present invention is used as a
receiver of the electronic stethoscope, it becomes a stethoscope that can hear the upper, lower,
left and right sound fields.
[0069]
Also in the electronic stethoscope, an electronic stethoscope with higher sound quality can be
provided by using the right upper and lower front and back sound field receiver (a) and the left
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25
upper and lower front and rear sound field receiver (b) shown in FIG.
A total of four microphones are disposed one by one in each of the four divided cavities in the
closed four-divided 45 chest piece, and the vibrating membrane is viewed from the test subject
side clockwise from the top to the first cavity The microphone, the second microphone in the
second cavity, the third microphone in the third cavity, and the fourth microphone in the fourth
cavity are disposed.
[0070]
The electric signal from the first microphone is amplified by the first amplifier, and the sound
generator units 284R and 284L of the left and right upper and lower front and rear sound field
receivers are driven by the sound generator driving device 1, and the electric signal from the
third microphone is the third amplifier The sound generator drive units 3 drive the sound
generator units 283 R and 283 L of the upper and lower front and rear sound field receivers by
the sound generator drive unit 3, and the second amplifier amplifies the electric signal from the
second microphone and left by the sound generator drive unit 2. The sound generator 281 L unit
is driven, the electric signal from the fourth microphone is amplified by the fourth amplifier, and
the sound generator unit 281 R is driven by the sound generator driver 4.
[0071]
Further, as shown in the block diagram of FIG. 37, the forward localization becomes clearer by
using a closed quadruple 45 chest piece and upper and lower front and back sound field
receivers and using a delay device.
The electric signal from the first microphone is amplified by the first amplifier, and the first
sound generator units (284R and 284L in FIG. 28) of the left and right upper and lower front and
rear sound field receivers are driven by the sound generator drive device 1. Is amplified by the
third amplifier and the left and right front and rear sound field receivers (283 R and 28 3 L in
FIG. 28) are driven by the sound generator drive device 3 and the electric signal from the second
microphone is amplified by the second amplifier The left sound generator drive unit 2 drives the
left second sound generator unit (281L in FIG. 28), and at the same time, the output signal of the
second amplifier is also input to the left delay processing device, and the output signal from the
left delay processing device Is input to the right speaker driving device 4 and the right speaker
driving unit 4 drives the right fourth speaker unit (282R in FIG. 28), and the electric signal from
the fourth microphone is amplified by the fourth amplifier and the right Right second sound
10-05-2019
26
generator (sound generator drive 2) 28 R), and at the same time, the output signal of the fourth
amplifier is also input to the right delay processing device, and the output signal from the right
delay processing device is the left fourth sound generator unit (FIG. 28). Drive the 282L).
[0072]
Further, as shown in the block diagram of FIG. 38, the signal of the first amplifier is input to the
delay processing device 1, and the output signal is mixed with the signal from the third amplifier
in the mixer 3 and input to the sound generator drive device 3. The third sound generator unit of
left and right upper and lower front and rear sound field receivers is driven, the signal of the
third amplifier is input to the delay processing device 3, and the output signal is mixed with the
signal from the first amplifier by the mixer 1 to produce the sound generator. By adding to the
driving device 1 and driving the first sound producing unit of the left and right upper and lower
front and rear sound field receivers, the frontal localization and the localization in the vertical
direction become clearer.
[0073]
FIG. 32 shows a schematic external view of an electronic stethoscope that uses upper and lower
front and rear sound field receivers.
3201L is the left upper and lower front and back sound field handset, 3201R is the right upper
and lower front and back sound field handset, 3202 is a neck strap holding the whole electronic
stethoscope, 3203L is the flexibility embedded with the left upper and lower front and back
sound field receiver drive signal line Tube, 3203R is a flexible tube embedded with right and left
front and rear sound field receiver drive signal lines, 3204 is a volume control knob with a power
switch, 3205 is a delay time control knob 3206 is a battery inside, and the electric signal from
the microphone is amplified 3207 is a flexible tube in which four microphone cords are
embedded, 3209 is a second cavity, 3211 is a second cavity, and 3211 is a third cavity. , 3212 is
a fourth cavity, 3218 is a cavity partition member, and 3213 is a signal connected to the first
microphone. 3214 is a signal line connected to the second microphone, 3215 is a signal line
connected to the third microphone, and 3216 is a signal line connected to the fourth
microphone.
[0074]
10-05-2019
27
The application of the present receiver to a hearing aid will now be described.
In a hearing aid for one ear, a system in which environmental sound is collected by one
microphone, sound waves are generated by one sounding body after hearing aid processing, and
environmental information sound is transmitted to the eardrum.
In the conventional hearing aids, there is a problem that it is difficult to distinguish between the
sound that you want to hear and the sound that you do not want to hear.
It is considered that this is because environmental sound information collected from the
microphone is not heard in the sound field before and after the sound field, but one sounding
body causes all sound to be heard as arrival sound from the same direction.
[0075]
There are also hearing aids that use two hearing aids for single-ear hearing and have left and
right stereo reproduction to improve the sense of the left and right direction of the incoming
sound, but discrimination of front and back sounds is not possible and the problem of in-head
localization is solved Not.
There is no hearing aid in which the direction of the incoming sound from the back and forth can
be identified in the single ear hearing and the only sound that one wants to hear is easy to hear.
[0076]
The center of the concha which will be described later is the middle of the coronal plane 111
passing the ridge line from the back of the head of the tragus 114 shown in FIG. 11A and the
coronal plane 113 passing the ridge line from the back of the pair of rings 115. It refers to the
concha region through which the coronal plane 112 passes.
The coronal plane is any plane that divides the body of an organism into the ventral (front) and
back (post).
10-05-2019
28
Fig. 11 (b) shows a perspective view of the central coronal plane of the concha. Further, a traguspair-to-collar-to-ringline surface 224 (hatched portion) shown in FIG. 22A indicates a surface
surrounded by the ridgeline of the tragus 221 and the ridgeline of the tragus 222 and the pair
ring 223. FIG. 22 (b) shows the tragus pair versus the parallel pair on the head cross section at
the location of the ear canal 225.
[0077]
Hereinafter, a microphone for electrically converting environmental sound information coming
from the front is simply referred to as a front microphone, and a microphone for electrically
converting environmental sound information coming from the rear is referred to as a rear
microphone. In addition, an axis extending in the direction of the sound source for sound
collection perpendicular to the microphone sound receiving surface from the center of the
microphone sound receiving surface 161 shown in FIG. 16 is referred to as a microphone sound
collecting axis 162.
[0078]
The hearing aid provided in the present application comprises at least a hearing aid processing
unit 1 for processing a sound signal from the front microphone and a hearing aid processing unit
2 for processing a sound signal from a rear microphone and a battery. The hearing aid
processing unit 1 and the hearing aid processing unit 2 The present invention is a hearing aid
having a structure including the front and rear sound field receiver according to the present
invention as a receiver for converting an output signal of the speaker into an acoustic signal. The
incoming sound from the front microphone drives the front sound generator unit of the front and
back sound field receiver through the hearing aid processing means 1 to be localized forward
and made to hear and the incoming sound from the rear microphone passes through the hearing
aid processing means 2 back and forth When the rear speaker unit of the field receiver is driven
and localized to the rear and heard, the incoming sound captured by the front microphone and
the rear microphone can be heard as a sound field expanded forward and backward. If you
concentrate your mind on the direction of arrival of the sound you want to hear from the sound
field that has spread before and after this, it is possible to obtain the effect that it is easy to hear
only the sound you want to hear.
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[0079]
The above-described hearing aid processing means is a means for amplifying a voice signal from
a microphone to drive a sounding body, and means including a band pass filter useful for hearing
sound, noise suppression, and howling suppression processing. In the illustration of the hearing
aid, the hearing aid processing means and the battery are omitted for the sake of clarity.
[0080]
In an application to the ear hook type hearing aid, as shown in FIG. 17 (a), a schematic
perspective view of the ear hook type hearing aid for left attachment is shown in FIG. The sound
axis 172 is disposed at an angle 174 within a range of greater than 0 degrees and less than 90
degrees with respect to the sagittal plane 170, and the sound collection axis 173 of the rear
microphone is greater than 90 degrees and 180 with respect to the sagittal plane. Hearing aid
processing means 1 for arranging the output signal of the front microphone for hearing aid
processing, the hearing aid processing means 2 for listening processing for the output signal of
the rear microphone, front sound producing unit, rear sound producing unit and battery The
front sound producing unit is driven by the output of the hearing aid processing means 1 and the
rear sound producing unit is driven by the output of the hearing aid processing means 2 so as to
be respectively provided in the front sound producing unit and the rear sound producing unit.
The sound emission axis 176 of the sound conduit connected to the front sound producing unit
in the ear canal in which the sound wave is led out of the housing by the continuous sound
conduit and the earpiece is attached to the tip of the sound conduit and the tip of the earpiece is
inserted The sound wave is emitted toward the side wall of the ear canal on the forehead side of
the ear canal, and the sound wave emission axis 177 of the sound conduit connected to the rear
sound generator unit is directed to the side wall of the ear canal on the back side of the ear canal
It will be possible to hear the sound field before and after. The sound conduit connected to the
forward sound producing unit is connected to the first sound conduit of the front and back sound
earpieces using the front and back sound earpieces, and the sound conduit connected to the back
sound emitting unit is the second sound conduit of the front and back sound earpieces You may
connect to FIG. 17 (b) is also the same left ear hook type hearing aid, 178 is a front microphone,
179 is a rear microphone, 1710 is a front sound emission port, 1711 is a rear sound emission
port, 1712 is a housing, 7113 is a front and back sound earpiece A sound conduit 7114 is
connected to the first sound conduit, and a sound conduit is connected to the second sound
conduit of the front and back sound earpiece.
[0081]
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In the above-mentioned ear hook type hearing aid without using the sound producing unit in the
case, the front and rear sound field handsets are used, and the output signals from the hearing
aid processing means 1 and the hearing aid processing means 2 are derived from the case by
signal lines The environmental sound output signal drives the front sound generator unit of the
front and back sound field receiver by hearing aid processing means 1, and the environmental
sound output signal of the back direction drives the rear sound generator unit of front and back
sound field receiver by hearing aid processing means 2 Also good.
[0082]
In the application to the in-the-ear hearing aid, FIG. 18 shows the cross-section of the head in the
ear canal when the in-the-ear hearing aid is attached. In the case 1812, the front sound generator
unit 1802, the rear sound generator unit 1804, and the electric circuit device hearing aid
processing A support portion 181 including a means 1, a hearing aid processing means 2 and a
battery, and extending from a part of the case to the center of the concha or the direction of the
opposite ear as shown in FIG. 18 (a). The microphone collection axis 182 of the front microphone
189 is disposed within a range of an angle 183 greater than 0 degrees and less than 90 degrees
with respect to the sagittal plane 180, and the rear microphone collection of the rear microphone
1811 is formed. The axis 185 may be disposed on the support so as to pass through the tragusto-parallel-to-braid line surface 184, but in this figure it is disposed on the main body case 1811
and a hearing aid processing means for hearing the output signal of the front microphone 1 and
after The output signal of the hearing aid processing unit 1 drives the front sound generator unit,
and the output signal of the hearing aid processing unit 2 drives the rear sound generator unit,
and is inserted into the ear canal. The sound wave emission axis 1801 of the front sound
generator unit is directed from the sound wave emission port of the front case to the side wall of
the ear canal on the forehead side, and the sound wave emission axis 1803 of the rear sound
generator unit is disposed. Can be arranged to emit sound waves toward the side wall of the ear
canal on the back of the ear canal.
Reference numeral 1824 denotes a hearing aid processing means 1; 1825, a hearing aid
processing means 2;
[0083]
As shown in FIG. 18 (b) 1810, the microphone collecting axis of the front microphone is
arranged in the case main body so as to face the opposite wheel direction from near the center of
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the ear concha and not passing through the tragus bead and the bead bead ring surface 184 You
may. FIG. 19 shows an actual mounting view. 191 is a front microphone, 192 is a rear
microphone, and 193 is a support.
[0084]
FIG. 24 shows a hatched region 233 at a portion connected to the ear canal opening from a
portion supporting the tragus at a portion below the hatched region 232 on the inner side of the
tragus shown in FIG. Reference numeral 230 denotes an ear canal opening and 231 tragus.
[0085]
A cross section at the time of wearing in the ear canal in the application to a deep canal type
hearing aid which is a size that fits in the ear canal is shown in FIG. The positional relationship
between the front microphone, the rear microphone, the front sound generator unit, and the rear
sound generator unit is shown, and the front sound generator unit 2101 and the rear sound
generator unit 2102 are provided in the case. In the direction of the area from the inner side of
the tragus or near the center of the concha to the area of the opposite ring shown by the hatched
portion 232 in FIG. The rear microphone 2107 is disposed in the case so that it does not pass
through 224, and the rear microphone sound collection axis 2104 is in the direction of passing
through the tragus bead to the bead parallel ring surface 2100, or the rear microphone sound
collection axis 2104 is hatched in FIG. Hearing aid processing to place the output signal of the
front microphone in a hearing aid processing from the base of the tragus (part supporting the
tragus) shown in the section 233 (part supporting the tragus) toward the part connected to the
periphery of the ear canal opening The hearing aid processing means 2 and the battery are
stored in the case, the front sound producing unit is driven by the hearing aid processing means
1, and the rear sound producing unit is driven by the hearing aid processing means 2, A sound
wave is emitted from the sound wave emission port of the ear canal insertion section toward the
side wall on the forehead side of the ear canal from the sound wave emission port 2111 for
forward sound, and the sound wave emission axis 2112 for sound from the sound emission port
of the ear canal insertion area It may be disposed to emit sound waves toward the back of the ear
canal.
[0086]
First Embodiment
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[0087]
An inner-type front and rear sound field receiver will be described below as one of the best
modes for carrying out the present invention with reference to FIG.
FIG. 5 (b) shows a schematic cross-sectional view of the inner ear type front and back receiver for
the right ear, in which two sound conduits of the first sound conduit 54 and the second sound
conduit 55 are disposed in one earpiece cylindrical portion 503. The first sound conduit is
connected to the housing sound conduit 501 of the front sound producing unit 56 as a sound
conduit for front sound, and the earpiece 51 is inserted into the ear canal as the direction sound
emission axis 51 at the sound wave emitting end of the sound conduit for front sound The
second sound conduit is connected to the housing sound conduit 502 of the rear sound
generator unit 57 as a rear sound conduit, and is disposed in the earpiece toward the ear canal
wall on the forehead side of the external auditory canal. The direction sound wave emission axis
52 at the end face of the sound wave emission end is disposed in the earpiece tube portion
toward the wall of the ear canal on the back of the ear canal with the earpiece inserted in the ear
canal. Fig. 5 (a) is a front view of the earpiece for the right ear and inserted into the ear canal as
seen from the tympanic membrane side, 58 is a front sound sound emission port, 59 is a rear
sound sound emission port, and 53 is an umbrella of the earpiece. Indicates The housing sound
conduit may be extended and used as a substitute for the first sound conduit and the second
sound conduit.
[0088]
The shape of the inner lumen of the in-house sound conduit may be a horn shape that opens at
the sound emitting end. FIG. 5C shows a perspective view of an example of the lumen of the
horn-shaped intraductal sound conduit. Reference numeral 509 denotes an acoustic wave
emitting end face, and 510 denotes a connection end cavity with the sound generator unit. Fig. 5
(d) is a front view of the earpiece seen from the tympanic membrane side when the lumen shape
of the in-tube sound conduit is for the right ear and in the front view of the earpiece as seen from
the eardrum side; An end face 513 indicates an umbrella-like portion of the earpiece. If this front
and rear sound field receiver is used as a pair on the left and right, it becomes headphones for
surround reproduction by the inner type handset.
[0089]
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Second Embodiment FIG. 8 (a) shows a schematic perspective view of the upper and lower front
and rear sound field handsets for the right ear, and the front sound conduit and the rear sound
conduit are omitted to facilitate understanding in FIG. 8 (b). The schematic of the longitudinal
cross-section of only an up-and-down sound conduit is shown. The second sound producing unit
81 as the forward sound producing unit, the fourth sound producing unit 82 as the rear sound
producing unit, the first sound producing unit 84 as the sound producing unit for the upper
sound, and the third sound producing unit as the sound producing unit for the lower sound Two
sound conduits, an upper sound conduit 85 and a lower sound conduit 86, which are composed
of 83 sounding units and further arranged vertically vertically to the front and back sound field
receiver shown in FIG. The upper sound conduit 85 is used as an upper sound conduit, and the
upper sound speaker unit 84 is connected, and the direction sound emission axis 806 of the
upper sound speaker 806 FIG. 8 (b) is the upper portion of the ear canal where the earpiece is
inserted into the ear canal The lower sound generator unit 83 is connected to the wall with the
additional lower sound conduit 86 added as a lower sound sound conduit, and the direction
sound wave emission axis 807 of the lower sound generator is an earpiece. Is inserted into the
ear canal Placing the earpiece tubular portion toward the bottom wall of the road. FIG. 8 (c)
shows a front view of the right upper and lower front and rear sound field receiver viewed from
the tympanic membrane side. 801 is a front sound emission port, 802 is a rear sound emission
port, 803 is a lower sound emission port, 804 is an upper sound emission port, and 805 is an
umbrella of the earpiece.
[0090]
Third Embodiment FIG. 7 (a) shows a schematic cross-sectional view of a receiver using a multisound emitting axis sound producing unit in which three branched sound conduits are disposed
in an earpiece tube for the right ear. . The sound emission axes of the three branched sound
conduits branched from the main sound pipe 71 are arranged to have different incident angles
with respect to the sagittal plane. The shortest sound conduit 72 is for direct sound contributing
to forward localization, and its direction sound wave radiation axis is directed toward the ear
canal wall on the forehead side of the ear canal with the tip of the earpiece inserted in the ear
canal And the other sound conduits are arranged as the sound conduits for indirect sound with
their sound emission axes directed to the shortest branch sound conduit on the same side 73 and
the opposite wall 74 of the ear canal wall. 70 is a sound generator unit. FIG. 7 (b) is a front view
of the earpiece shown in FIG. 7 (a) and shows the sound emission ports of the three branched
sound conduits. A direct sound sound emission port 75, an indirect sound sound emission port
76 on the same side as the direct sound, and an indirect sound sound emission port 77 on the
back of the head opposite to the direct sound are shown.
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[0091]
Fourth Embodiment FIG. 12 shows the configuration of a receiver having an acoustic reflection
diffuser. In an inner type handset having a sound conduit (tubular portion) inserted into the ear
canal, from the sound emitting end face (12 of FIG. 1) of the sound conduit in the earpiece tube
to the housing sound conduit of the sound generator unit connected to the sound conduit. An
embodiment for the right ear provided with an acoustic reflection diffuser with a smooth surface
with acoustic diffusion and acoustic reflection in the inner lumen is shown in FIG. (A) and (b) are
cross-sectional views, and (c) shows a front view seen from the tympanic membrane side. (A)
shows an example in which the acoustic reflection diffuser 123 is provided in the housing sound
conduit, and the shape is such that the sound wave 122 emitted from the sounding body is
reflected to the acoustic reflection diffuser and the tip of the earpiece is inserted into the external
ear canal In this state, the sound wave is radiated to the wall of the ear canal on the forehead side
of the ear canal. FIG. 12 (b) shows an example in which the sound wave reflection diffuser has a
structure 124 in which a part of the inner surface of the sound conduit in the earpiece tube of
the member comprising the earpiece is raised in a projecting shape having a smooth curved
surface. Fig. 12 (c) is a view from the tympanic membrane side of (b) having an acoustic
reflection diffuser on the inner surface of the sound conduit in the earpiece. 125 is the acoustic
reflection diffuser end face, 126 is an acoustic emission port, 120 is an earpiece It is an
umbrella-like part of
[0092]
Fifth Embodiment FIG. 14A is a schematic view of a tube type headphone, and is a schematic
perspective view of a right ear insertion earpiece and a tube. It is a tube type (conduit type)
stereo earphone used mainly at the passenger seat of the aircraft. The sound wave of the sound
tube of the tube at the sound emitting end face of the tube sound tube in the earpiece tube
portion 145 is directed to the forehead side wall of the ear canal at the ear canal site where the
tip of the earpiece 140 is inserted It radiates toward the ear canal wall on the forehead side using
the reflection diffuser provided in the tube from the radiation port. FIG. 14 (c) shows a cross
section which is an example of the embodiment using the reflection diffuser 142. 140 is an
umbrella-like part. FIG. 14 (b) is a front view of the right ear insertion earpiece as viewed from
the side of the external ear canal, showing a sound wave emission port 143 and a reflection
diffuser end face 142.
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[0093]
Sixth Embodiment If a pair of left and right tube sound conduits is used, it becomes a tube type
stereo earphone that is positioned outside the head ahead. As shown in FIG. 15, a front tube
sound conduit 151 and a rear sound tube sound conduit 152 are disposed in the right ear
insertion earpiece tube as shown in FIG. Sound tube sound emission axis at the sound emission
tip of the sound tube for sound in the back is directed to the occipital occlusal wall of the ear
canal at the area of the ear canal where the tip of the earpiece is inserted The form of the
surround apparatus equipped to emit using the reflective diffuser with which it is equipped with
is shown.
[0094]
FIG. 15 shows a form of a tube type front and rear ear horn for the right ear using the front
sound reflection diffuser 156 and the rear sound reflection diffuser 157. FIG. 15 (a) is a
schematic perspective view of the right ear insertion earpiece and the tube of the tube type
headphone capable of reproducing the front and back sound field. The front sound tube sound
conduit and the rear sound tube sound conduit are arranged in one earpiece tube. If a pair of
right and left is provided, it becomes a tube type surround receiver which can perform surround
reproduction. FIG. 15 (b) is a front view of the earpiece as viewed from the side of the external
ear canal of the right ear insertion earpiece, including a front sound wave radiation port 153 and
a rear sound wave emission port 154; Show the face. FIG. 15C shows an example of the shape of
the front reflection diffuser 156 and the rear reflection diffuser 157 in the cross-sectional view
of the earpiece. Reference numeral 158 is a front sound tube sound conduit, and reference
numeral 159 is a rear sound tube sound conduit.
[0095]
Seventh Embodiment FIG. 17 (b) shows a schematic perspective view of an embodiment of the
ear hook type hearing aid for wearing the left ear. The front microphone 178 and the rear
microphone 179 are provided at the upper part of the housing 7112 attached to the rear of the
ear wheel, and the sound collection axis of the front microphone is within an angle of greater
than 0 degrees and less than 90 degrees with respect to the sagittal plane. 17 (a) 174, and the
sound collection axis of the rear microphone is disposed at an angle as shown in FIG. 17 (a) 175
which is more than 90 degrees and less than 180 degrees with respect to the sagittal plane. The
hearing aid processing means 1 for hearing processing the output signal of the front microphone
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and the output signal of the rear microphone are provided in the casing with the hearing aid
processing means 2, the front sound generator unit, the rear sound generator unit and the
battery, and the output signal of the front microphone is hearing aid The signal is output to the
forward sound generator unit through the processing means 1 and the output signal from the
rear microphone is output to the backward sound generator unit through the hearing aid
processing means 2. The sound conduit 7113 connected to the front sound generator unit and
the sound conduit 7114 connected to the rear sound generator unit derive sound waves, and the
sound conduit 7113 connected to the front sound generator unit is connected to the first sound
conduit of the front and rear sound earpieces The sound conduit 7114 connected to the rear
sound producing unit is connected to the second sound conduit of the front and rear sound
earpiece. The sound emission axis of the sound conduit connected to the front sound generator
unit radiates a sound wave from the front sound emission port 1710 to the side wall of the ear
canal on the forehead side of the ear canal, and the sound emission of the sound conduit
connected to the back sound generator unit An acoustic wave is emitted from the rear sound
emission port 1711 toward the back of the ear canal.
[0096]
Eighth Embodiment FIGS. 18 (a) and 18 (b) show cross-sectional views of the ear canal for the
right ear in the ear canal. A schematic mounting view of the right ear earhole hearing aid is
shown in FIG. Hearing aid processing means 1 for processing the output signals of the front
sound generator unit, the rear sound generator unit, the front microphone and the front
microphone in a body case 1812, a hearing aid processing means 2 for the hearing processing of
the output signals of the rear microphone and rear microphone and a battery 1814 includes a
tubular support portion 181 extending in the opposite ring direction from the center of the
concha center part from a part of the case, and a front microphone 189 for electrically
converting environmental sound information in the forward direction is disposed thereon The
front microphone sound collecting axis 182 in FIG. 18 (a) is disposed at an angle within the
range of an angle 183 which is larger than 0 degrees and smaller than 90 degrees with respect
to the sagittal plane, and environmental sound information in the backward direction is
electrically Rear microphone 1811 to be converted is disposed on the case surface, and the rear
microphone sound collection axis 185 in FIG. 18 (a) is an angle 1805 larger than 90 degrees and
smaller than 180 degrees with respect to the sagittal plane and microphone collection axis 1 for
the rear direction 5 is disposed in the main body case so as to pass through the tragus vs beads
antihelix ridge surface 184 (224 shown in FIG. 22). The output of the hearing aid processing
means 1 for processing the output signal of the front microphone for hearing aid is driven to the
front sound generator unit 1802 and the output signal for the rear microphone is inputted to the
hearing aid processing means 2 for hearing aid processing and the back sound is generated by
the output of the hearing aid processing means 2 The body unit 1804 is driven. Denoted at 1824
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is a hearing aid processing means 1 and 1825 is a hearing aid processing means 2, and the
electric cord from the front microphone disposed on the tubular support portion is connected to
the hearing aid processing means 1 through the support portion tube.
[0097]
FIG. 20 shows a front view of the right ear earhole hearing aid as viewed from the tympanic
membrane side. The case main body 2000 and an ear canal insertion portion 2001 of the tip
portion inserted into the ear canal are shown. At the insertion site of the ear canal, sound waves
are emitted from the front sound emission port 2002 with the direction sound emission axis of
the front sound generator unit directed to the side wall of the ear canal on the forehead side of
the ear canal. A sound conduit sounding body is disposed to emit sound waves with the sound
emission axis directed toward the back of the ear canal.
[0098]
(Ninth Embodiment) FIG. 18 (b) shows the case where the front microphone 189 is not disposed
on a support portion that extends in the opposite direction from the center of the concha center
from a part of the case in the earhole type hearing aid. In the case where the microphone
collecting axis 1810 of the front microphone is arranged in the case so that the microphone
sound collecting axis 1810 of the front microphone is directed in the opposite ring direction
from near the center of the concha and not passing through the tragus bead .
[0099]
Tenth Embodiment FIG. 21 is a schematic cross-sectional view of the deep canal hearing aid for
the right ear when worn on the ear canal.
A hearing aid processing unit 1 for processing the output signals of the front sound generator
unit 2101, the rear sound generator unit 2102, and the front microphone 2106 in the case, a
hearing aid processing unit 2 for hearing the output signal of the rear microphone 2107 and a
battery The microphone collecting axis 2103 is arranged so that the microphone collecting axis
2103 is directed in the opposite ring direction from the center of the concha and not passing
through the tragus-to-javel-to-wax line surface, and the rear microphone collecting axis 2104 is
21 (a) passing through the surface or the rear microphone sound collecting axis 2104 FIG. 21 (b)
is a tragus base shown by the hatched area 233 in FIG. 24 without passing through the tragus
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bead versus the bead pebble surface 21 (b), and the output signal of the front microphone 2106
is processed by the hearing aid processing means 1 for hearing aid processing from the front
microphone unit 2101 (from the part supporting the tragus) toward the part connected to the
ear canal opening The drive The output signal of the rear microphone 2107 is subjected to
hearing aid processing by the hearing aid processing means 2 to drive the rear sound generator
unit 2102, and the direction emission axis 2111 of the front sound generator unit from the
sound emission port of the ear canal insertion portion The sound generator unit is disposed so as
to emit a sound wave toward the side wall and to emit a sound wave from the sound emission
port of the ear canal insertion portion toward the side wall on the back of the ear canal. 2113
shows the arrangement of the hearing aid processing means 1 including the battery and the
hearing aid processing means 2.
[0100]
Eleventh Embodiment FIG. 29 shows a schematic perspective view of a stereo stethoscope. In the
chest piece, the cavity forming the sound pickup portion closed by the vibrating membrane is
divided into two parts of left cavity 2902 and right cavity 2903 by partition member 2900 at the
center, and from the tip projecting from each two partitioned cavities The left sound conduit
2904 is connected to the sound conduit 2904 in the left cavity, the right sound conduction tube
2907 is connected to the sound conduit 2906 in the right cavity, and the left sound conduction
tube is provided. Are divided into two, the first sound conduction tube 2908 and the second
sound conduction tube 2909, and the sound conduction tubes for the right ear are similarly
divided into the first sound conduction tube 2910 and the second sound conduction tube 2911
The left first sound guiding tube is the first part of the left and right sounding earpieces 2912.
Connected to the sound conduit 2914, the right first sound conduction tube is connected to the
first sound conduit 2915 of the right front and back sound earpiece 2913, and the left second
sound conduction tube is connected to the second sound conduit 2917 of the right front and
back sound earpiece The right second sound guide tube is connected to the second sound
conduit 2916 of the left and right sound earpieces. In order to make the left second sound
conduction tube longer than the left first sound conduction tube, a part is made a coil shape, and
similarly, a right second sound conduction tube is made a coil shape so as to make it longer than
the right first sound conduction tube And
[0101]
Twelfth Embodiment FIG. 30 shows a schematic perspective view of the upper and lower left and
right stethoscopes. Top left branch Sound guide tube 3031 and right top sound branch sound
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guide tube The sound conduction tube 3041 connected to the sound conduit 3061 of the first
cavity 3071 using upper and lower front and rear sound earpieces and using a 4-split 45 chest
piece 3021 bifurcated left upper sound branch sound conduction tube is connected with the first
sound conduit 3011 of left upper and lower front and rear sound earpiece, right upper sound
branch sound conduction tube is the first sound conduit of right upper and lower sound earpiece
The sound conduction tube 3043 connected to the sound conduit 3063 of the third cavity 3073
is connected to 3001 and branched into two, the left lower sound branch sound conduction tube
3033 and the right lower sound branch sound conduction tube 3023, and the left lower sound
The branch sound conduction tube is connected to the third sound conduit 3013 of the left
upper and lower front / rear sound earpiece, and the lower right sound branch sound conduction
tube is the third of the right upper / lower front and rear sound earpiece The sound conduction
tube 3057 connected to the conduit 3003 and connected to the sound conduit 3067 of the
fourth cavity 3077 is branched into two lines 3022 of the right branch sound conduction tube 1
and 3034 of the right branch sound conduction tube 2. The sound conduction tube 3056
connected to the sound conduit 3066 of the second cavity 3076 is also branched into two of the
left branch sound conduction tube 3032 and the left branch sound conduction tube 3024, and
the right branch sound conduction tube 1 respectively The left branch sound conduction tube 1
is connected to the left upper and lower sound earpiece second sound conduit, the right branch
sound conduction tube 2 is connected to the left upper and lower sound Connected to the
earpiece fourth sound conduit, the left branch sound conduction tube 2 is connected to the right
and left front / rear sound earpiece fourth sound conduit. Furthermore, in order to make the
right branch sound conduction tube 2 longer than the right branch sound conduction tube 1 and
the left branch sound conduction tube 2 longer than the left branch sound conduction tube 1, the
right branch sound conduction tube 2 and the left branch A part of the sound conduction tube 2
has a coil shape to give a sound delay effect.
Effect of the invention
[0102]
As described above, according to the front and back sound earpiece of the present invention and
the receiver using the same, even if it is a single ear hearing sound, the sound field extending
back and forth can be heard and the arrival direction of the front and back sound can be
identified. You can hear it with a natural sound localized. By using the upper and lower front and
rear sound earpieces and the handset using the same, the directions of arrival of the upper and
lower front and rear sounds can be identified. Furthermore, when the front and rear sound field
receiver according to the present invention is used as a receiver which is one of the components
of the hearing aid, the concentration of the consciousness in the direction of arrival of the sound
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to be heard makes it easy to hear only the sound to be heard.
[0103]
The application to the stethoscope is composed of the basic elements of the sound pickup unit,
sound conduit and earpiece, but by using the front localization earpiece or front and back sound
earpiece for this earpiece, high-quality auscultation auscultated with high sound quality can be
obtained outside the head Furthermore, it is possible to distinguish the direction and movement
of the auscultation sound from the upper, lower, left and right by using upper and lower frontal
earpieces or upper and lower frontal and earpieces and four split chest pieces or four split 45
chest pieces.
[0104]
(A) sound wave emission axis and (b) sound wave emission cross section (c) a cross section view
on an exceptional ear canal surface of a part of the inner type receiver of the present invention
(a) center axis of the ear canal (b) center axis of earpiece (A) Forward localization receiver (b)
Rear localization receiver (a) Upper localization receiver (b) Lower localization receiver Right and
left sound field receivers for right ear (a) Front view seen from tympanic membrane side (b)
Crossing front and rear sound field receivers Face (c) A schematic view of the horn-shaped sound
conduit lumen shape (d) is a front view of the horn-shaped sound conduit sound emission port
seen from the tympanic membrane side of (c) (e) of the right front and rear sound field receiver
Cross-sectional view in the ear canal Multi-channel receiver for the right ear Multi-channel
receiver for the right ear A schematic cross-sectional view (a) and a front view (b) of the example
of the three-branch sound conduit of the sound emitter Schematic perspective view of the upper
and lower front and rear sound field handset for the right ear (b) Schematic of the vertical cross
section of the upper and lower sound conduit (c) Drum Front and rear front and rear sound field
receiver for the right ear viewed from the membrane side Front view Delay time processing
device Drive amplifier with main processing sound conduit and branch sound conduit (a) Coronal
plane passing through the middle of the concha shell seen from the top of the head (b) A
perspective view of the coronal plane passing through the middle part of the concha cavum
acoustic diffuser and acoustic reflector (a) sagittal plane incident angle (b) transverse sectional
axis incident angle tube type headphone for right ear tube type headphone for headphone right
ear Sound collection axis Ear Hearing Aid Cross-sectional view of the hearing aid attached to the
external ear canal Outline mounting of the right ear earhole hearing aid Front view viewed from
the tympanic side of the deep canal (CIC) hearing aid for the right ear Deep canal type (CIC)
hearing aid external ear canal outline schematic cross section tragus vs. twine vs ring surface line
internal side tragus base top and bottom front sound earpiece top and bottom front sound
earpiece vertical cross section quadrilateral chest piece electronic stethoscope top and bottom
front and back Sound Earpieces Stella Stethoscope upper and lower left and right and left
stethoscope left and right earpiece with D1 sound conduit and earpiece electronic stethoscope
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with outline outline view 4 split chestpiece and sound conduit coiled delay sound conduit using
stethoscope upper and lower 45 earpiece upper and lower 45 receiver electronic auscultation
Block diagram electronic stethoscope with right and left delay block diagram with upper and
lower left and right delay device
10-05-2019
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