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DESCRIPTION JP2009049947

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DESCRIPTION JP2009049947
An object of the present invention is to provide a headphone capable of binaural recording, and
in particular, to provide a technology for utilizing a microphone of a noise cancellation
headphone. An earphone (32) comprises a body casing (33), a speaker casing (34), and a pinna
insertion portion (35). When the binaural recording and noise cancellation headphone 30 is
made to function as a binaural recording microphone, the speaker casing 34 is swung to open
the microphone 41 to the outside. [Selected figure] Figure 4
Binaural recording and noise cancellation headphones
[0001]
The present invention relates to noise canceling headphones, and more particularly to binaural
recording and noise canceling headphones having the function of a recording microphone.
[0002]
In recent years, with the spread and price reduction of digital audio players called silicon players
using a flash memory as a recording medium, listening to music using headphones has become
widespread.
[0003]
In such a situation, it is very difficult to hear in a train with a lot of noise during commuting or
going to school, and it is necessary to increase the volume.
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Naturally, it has a great negative impact on hearing and causes great inconvenience to the
surroundings.
[0004]
As a means of reducing such noise and making music easier to listen to, there is a noise canceling
headphone, which is put on the market.
[0005]
FIG. 12 is a view showing a cross-sectional structure of the earphone unit 10 of the inner noise
cancellation headphone.
The earphone unit 10 includes a speaker 14, a microphone 16, and an pinna insertion unit 12.
The pinna insertion part 12 is attached to the pinnae part of a person, and while fixing the
earphone part 10 and a person's ear, it reduces the sound leak to the exterior. The sound output
from the speaker 14 is transmitted through the sound guiding tube 20 from the opening 18 to
the outside. In the case of reducing external noise, the microphone 16 provided between the
speaker 14 and the opening 18 picks up the sound output from the speaker 14 and the noise
coming from the external environment. Subsequently, the signal of the sound output from the
speaker 14 is compared with the signal collected by the microphone 16 to identify noise coming
from the external environment. The specific result is reflected on the sound signal output from
the speaker 14. This type of noise canceling headphone is generally referred to as feedback
controlled noise canceling headphone.
[0006]
There is also a method called binaural recording as a method of making a realistic sound
recording. This method is a recording method in which voice is recorded by a dummy head such
as a mannequin or two microphones attached to a human ear. By listening to the audio recorded
by this method using headphones, the user can listen to realistic audio as if he were at the
recording site.
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[0007]
With regard to this binaural recording, a technology relating to a microphone and headphone
using a unit that combines a speaker and a microphone is disclosed (see Patent Document 1). In
this technology, by sharing a unit that combines a speaker and a microphone, it is possible to
realize miniaturization at low cost.
[0008]
On the other hand, many silicon players having not only the reproduction function but also the
recording function are put on the market. At present, although there are few users who are
interested in this recording function, it is expected that more users will actively use this
recording function in the future. However, the microphone provided in the above-mentioned
silicon player is generally of low quality and can not always be recorded with satisfactory quality.
Therefore, if you intend to actively use the recording function, you will need to prepare a
dedicated microphone separately. However, assuming general use, it is not realistic for the user
to carry the microphone separately at all times. Therefore, a headphone in which the microphone
and the speaker are integrated as described above is desired. Japanese Utility Model Publication
No. 59-157380
[0009]
By the way, although the technology disclosed in Patent Document 1 can realize microphones
and headphones combined with a microphone at low cost, a single speaker can be combined with
the functions of a speaker and a microphone, so that the user desires from the viewpoint of
sound quality. There is a task that is said to be difficult to achieve quality. It is preferable to
configure the speaker and the microphone in separate units.
[0010]
However, in general, assuming that it is often used mainly as a speaker, it may not be possible for
the user to find so much in the cost increase due to incorporating a microphone that is
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infrequently used, simply by incorporating the microphone. is there. In fact, most commercially
available headphones with binaural recording microphones are expensive.
[0011]
Under such background, the inventor has come to recognize that the above-mentioned problems
can be solved by utilizing the microphone used for the noise canceling headphone. In other
words, the noise cancellation headphone already has a built-in microphone. Therefore, by using
this technology, it is possible to avoid the problem that the number of microphones increases and
the cost increases. Also, the performance of the microphone incorporated in the noise canceling
headphone is generally of a satisfactory quality, and has sufficient performance to pick up
external sound.
[0012]
In one embodiment of the present invention, a speaker, a microphone for collecting an external
sound for noise cancellation, and an pinna insertion portion are integrally configured, and the
pinna insertion portion, the speaker, and It comprises: two earphones in which microphones are
arranged in series in this order; and microphone function change means for exposing the sound
pickup portion of the microphone to the outside of the earphone and making the microphone
function as a recording microphone. Further, the microphone function changing means may
move the microphone from the serial arrangement to expose the sound pickup portion of the
microphone to the outside of the earphone. The microphone function changing means may move
the speaker from the serial arrangement to expose the sound pickup portion of the microphone
to the outside of the earphone.
[0013]
According to the present invention, a new form of headphones capable of binaural recording can
be provided. In particular, it is possible to provide noise-canceling headphones that realize
binaural recording by utilizing a microphone of noise-canceling headphones.
[0014]
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In the embodiment of the present invention, the microphone provided in the noise canceling
headphone is used as a microphone function for binaural recording as well as sound collection
for noise cancellation. Here, a pinna inserted type, so-called inner (canal) type headphone is
assumed. As mentioned above, the microphone of the noise cancellation headphone is provided
between the ear tip (also referred to as "auricle insertion part") and the speaker. Of course, if the
position of the microphone is provided between the speaker and the eartip, the external sound
can not be collected sufficiently. Therefore, in the following embodiment, when used as a
microphone for binaural recording, the speaker or the microphone is moved to expose the
microphone to the outside of the earphone. By exposing the microphone to the outside in this
way, when it is used as a microphone function for binaural recording, the microphone is open to
the outside, so it is possible to pick up the external sound sufficiently.
[0015]
Hereinafter, the present invention will be described with reference to the drawings. First
Embodiment FIG. 1 is an external view of a binaural recording and noise canceling headphone 30
according to a first embodiment. The binaural recording and noise canceling headphone 30
includes a cable 31 and first and second earphones 32a and 32b (hereinafter simply referred to
as "earphone 32" when the first and second earphones 32a and 32b are not distinguished from
each other). A connection terminal 38 is provided. The connection terminal 38 is connected to,
for example, a silicon audio player having an audio reproduction and recording function (not
shown). Hereinafter, an apparatus having an audio reproduction and recording function is
conveniently referred to as a "player".
[0016]
FIG. 2 is an enlarged external view of the earphone 32, and FIG. 3 is a cross-sectional view of the
earphone 32. As shown in FIG. The earphone 32 comprises a main body casing 33, a speaker
casing 34, and a pinna insertion portion 35. The main body casing 33 and the speaker casing 34
have a substantially cylindrical shape, and in the drawing, the main body casing 33 is overlapped
such that the left side is the speaker casing 34.
[0017]
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Moreover, the main body casing 33 and the speaker casing 34 are connected by the connection
pin 37 which penetrates the connection shaft 38 provided on the lower side of each. Thus, the
speaker casing 34 can swing relative to the main casing 33 about the connecting pin 37. In FIG.
2, illustration of the cable 31 is omitted for easy understanding.
[0018]
As can be seen from FIG. 3, the speaker 42 is fixed substantially at the center of the right inner
flat portion of the speaker casing 34. Further, on the left side flat portion of the speaker casing
34, speaker portion sound transmission holes 45 having a desired size and a desired number are
provided.
[0019]
A microphone sound through hole 49 of a desired size is provided in the right-side flat portion of
the main body casing 33. At the center of the microphone sound through hole 49, a microphone
41 is provided so as to be supported by the microphone support 46 in four directions.
Furthermore, on the left side of the main body casing 33, a sound guide tube 40 of a desired size
is provided.
[0020]
In addition, an auricle insertion portion 35 called an ear tip is attached to the tip of the sound
guiding tube 40, and is inserted into a person's auricle to fix the human ear and the earphone 32.
[0021]
In addition, a microphone signal line 43 for transmitting a signal of the collected sound is
attached to the microphone 41.
Further, a speaker signal line 44 for transmitting an audio signal to be output is attached to the
speaker 42. The microphone signal line 43 is bundled as a speaker signal line 44 and a cable 31
in the lower part of the main body casing 33.
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[0022]
Here, when the binaural recording and noise canceling headphone 30 functions as a noise
canceling headphone, the sound output from the speaker 42 is a speaker sound passage 45, a
microphone sound passage 49, a sound conduction tube 40, and a sound passage 39 It is output
to the outside, generally to the human ear. At this time, the microphone 41 picks up external
noise together with the sound output from the speaker 42 and transmits it to a player (not
shown).
[0023]
The player compares the signal collected by the microphone 41 with the signal of the sound
output from the speaker 42, and corrects the signal of the sound to be output so as to reduce
external noise by feedback control. . In addition, what is necessary is just to use a known
technique, in order to reduce noise by feedback control of an audio | voice signal.
[0024]
Subsequently, a case where the binaural recording and noise canceling headphone 30 functions
as a binaural recording microphone will be described. FIGS. 4 and 5 are diagrams showing the
earphone 32 in a state in which the binaural recording and noise canceling headphone 30
according to the present embodiment functions as a binaural recording microphone.
[0025]
As described above, when the microphone 41 is between the speaker 42 and the sound guiding
tube 40, the microphone 41 blocks external sound from the speaker 42 and can not sufficiently
collect sound. Therefore, in the present embodiment, as shown in FIGS. 4 and 5, the speaker
casing 34 is swung to open the microphone 41 to the outside. Thereby, the microphone 41 can
pick up the external sound well.
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[0026]
As shown in FIG. 5, the main body casing 33 is provided with first and second convex portions
50 a and 50 b. Further, the speaker casing 34 is provided with first to third recesses 51 a to 51 c.
Therefore, in the state as shown in FIG. 2 and FIG. 3, the first convex portion 50a and the first
concave portion 51a are locked, and further, the second convex portion 50b and the third
concave portion 51c are locked. Do. Thereby, the main body casing 33 and the speaker casing 34
overlap and are fixed.
[0027]
On the other hand, in the state as shown in FIG. 5, the main casing 33 and the speaker casing 34
are displaced by the second convex portion 50b and the second concave portion 51b being
engaged, and the microphone 41 is opened to the outside. It is fixed in the state. Alternatively,
the first convex portion 50a may have a switch function, and when the speaker casing 34 swings
and deviates from the speaker casing 34, the switch may be turned off and the input to the
speaker 42 may be turned off.
[0028]
As described above, according to the first embodiment, the microphone 41 in the noise
cancellation headphone 30 can be used not only for noise cancellation but also as a microphone
for recording an external sound. Also, when recording an external sound, the microphone 41 is
open to the outside, so that the external sound can be picked up well.
[0029]
Second Embodiment In the first embodiment, the speaker 42 is swung to open the microphone
41 to the outside. In the second embodiment, the microphone 41 itself is swung to be open to the
outside. FIG. 6 is a view showing the earphone 32 in which the microphone casing 54 can be
swung, and a view showing a state of functioning as a noise cancellation headphone. FIG. 7 is a
diagram showing the binaural recording and noise canceling headphone 30 functioning as a
binaural recording microphone. Hereinafter, the description of the same structure and operation
as those of the first embodiment will be omitted, and mainly characteristic points of the present
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embodiment will be described. In addition, the same code | symbol is attached | subjected about
a one part same component.
[0030]
In the first embodiment, the earphone 32 is composed of the main body casing 33, the speaker
casing 34, and the pinnae insertion portion 35. In the present embodiment, the earphone 32
includes a main body casing 53, a microphone casing 54, a speaker casing 55, and a pinna
insertion portion 35. In other words, the main body casing 33 of the first embodiment is divided
into two elements of the main body casing 53 and the microphone casing 54 so that the
microphone casing 54 can be rocked. On the other hand, the speaker casing 55 is fixed to the
main body casing 53 so as not to move. For this fixing, for example, the connecting shaft 38 of
the main casing 53 and the speaker casing 55 may be fixed by the connecting pin 37. In addition,
parts passing the upper portions of the main body casing 53 and the speaker casing 55 may be
separately provided and fixed.
[0031]
When the binaural recording and noise cancellation headphone 30 is made to function as a
binaural recording microphone, the user swings the microphone casing 54 so as to be drawn out
by the lead-out portion 52 provided on the top of the microphone casing 54. Thus, the
microphone 41 is opened to the outside.
[0032]
As described above, according to the second embodiment, as in the first embodiment, the
microphone 41 in the noise cancellation headphone can be used not only for noise cancellation
but also as a microphone for recording an external sound. Also, when recording an external
sound, the microphone 41 is open to the outside, so that the external sound can be picked up
well.
[0033]
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Third Embodiment In the first embodiment, the speaker casing 34 in which the speaker 42 is
accommodated is swung to open the microphone 41 to the outside. In the third embodiment, the
portion corresponding to the speaker casing 34 is rotated by the hinge mechanism to open the
microphone 41 to the outside. Hereinafter, the description of the same structure and operation
as those of the first embodiment will be omitted, and points that are particularly characteristic of
the third embodiment will be described. In addition, the same code | symbol is attached |
subjected about a one part same component.
[0034]
FIG. 8 is an external view of a portion of the earphone 32 of the binaural recording and noise
cancellation headphone 30 according to the third embodiment, showing a state of functioning as
a noise cancellation headphone. FIG. 9 is an external view of the earphone 32 portion of the
binaural recording and noise canceling headphone 30 according to the third embodiment,
showing a state of functioning as a binaural recording microphone.
[0035]
The right-side flat portion of the main body casing 33 and the left-side flat portion of the speaker
casing 34 are in contact with each other in an opposing state. At this time, a suction magnet 61 is
provided on the top of the flat portion of the main body casing 33, and a suction portion 62 that
suctions on the suction magnet 61 is provided on the top of the speaker casing 34. Thereby, the
main body casing 33 and the speaker casing 34 are separably fixed. Further, lower portions of
the main body casing 33 and the speaker casing 34 are rotatably connected by a hinge portion
60. A flat portion on the right side of the main casing 33 is provided with a desired size and a
desired number of main casing sound transmission holes 63. The left side flat portion of the
speaker casing 34 is similarly provided with a desired size and a desired number of speaker
portion sound transmission holes 64, and the sound outputted by the speaker 42 is appropriately
outputted from the sound emission hole 39.
[0036]
When the main casing 33 and the speaker casing 34 are fixed, the binaural recording and noise
cancellation headphone 30 functions as a noise cancellation headphone. On the other hand,
when functioning as a binaural recording microphone, the main body casing 33 and the speaker
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casing 34 are separated. At this time, the speaker casing 34 rotates about the hinge portion 60
and moves downward, and the right flat surface portion of the main body casing 33 is opened to
the outside as shown in FIG. As described above, the right side flat portion of the main body
casing 33 is provided with a desired size and a desired number of speaker portion sound passing
holes 63. Therefore, the microphone 41 is substantially open to the outside.
[0037]
The suction magnet 61 has a switch function, and when the suction magnet 61 and the suction
portion 62 are separated, the suction magnet 61 is turned off and the sound input to the speaker
42 is turned off.
[0038]
As described above, according to the third embodiment, as in the first and second embodiments,
the microphone 41 in the noise cancellation headphone can be used not only for noise
cancellation but also as a microphone for recording an external sound.
Also, when recording an external sound, the microphone 41 is open to the outside, so that the
external sound can be picked up well.
[0039]
Fourth Embodiment In the first to third embodiments, a casing provided with the speaker 42 is
provided separately from the casing provided with the microphone 41, and the microphone 41 is
opened to the outside by moving the casing. In the fourth embodiment, the microphone 41 and
the speaker 42 are provided in the same casing, and the microphone 41 is opened to the outside
by shifting the position of the speaker 42 itself. Hereinafter, the description of the same structure
and operation as those of the first embodiment will be omitted, and particularly characteristic
points in the fourth embodiment will be described. In addition, the same code | symbol is
attached | subjected about a one part same component.
[0040]
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FIG. 10 is an external view of a portion of the earphone 32 of the binaural recording and noise
cancellation headphone 30 according to the third embodiment, showing a state of functioning as
a noise cancellation headphone. FIG. 11 is an external view of a portion of the earphone 32 of the
binaural recording and noise canceling headphone 30 according to the third embodiment,
showing a state of functioning as a binaural recording microphone.
[0041]
As described above, the speaker 42 is fixed to the right side flat portion of the main body casing
33 so as to be vertically movable in parallel via the speaker guide portion 70. A switching unit 71
is provided on the back of the speaker 42, and moving the switching unit 71 moves the speaker
42. Further, a back surface hole 72 of a desired size is provided in the right flat surface portion
of the main body casing 33 facing the back surface of the speaker 42.
[0042]
As shown in FIG. 10, when the switching unit 71 is positioned at the top, the speaker 42 blocks
the back hole 72 to prevent external sound from entering the inside of the earphone 32. On the
other hand, as shown in FIG. 11, when the switching unit 71 is located at the bottom, the inside
and the outside of the main body casing 33 are opened through the back surface hole 72.
Therefore, the microphone 41 is also opened to the outside.
[0043]
As described above, according to the fourth embodiment, as in the first to third embodiments, the
microphone in the noise cancellation headphone can be used not only for noise cancellation but
also as a microphone for recording an external sound. Also, when recording an external sound,
the microphone is open to the outside, so that the external sound can be picked up well.
[0044]
The present invention can be widely used for headphones that integrally configure a binaural
recording function and a noise cancellation function.
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[0045]
FIG. 2 is an external view of a binaural recording and noise cancellation headphone according to
the first embodiment.
FIG. 6 is an enlarged view of an earphone part of binaural recording and noise cancellation
headphones according to the first embodiment, and is a diagram when functioning as a noise
cancellation headphone. FIG. 5 is a cross-sectional view of an earphone portion of the binaural
recording and noise cancellation headphone according to the first embodiment. FIG. 7 is a
diagram showing a state in which the binaural recording and noise canceling headphone
according to the first embodiment is caused to function as a binaural recording microphone, with
respect to an earphone. FIG. 7 is a diagram showing a state in which the binaural recording and
noise canceling headphone according to the first embodiment is caused to function as a binaural
recording microphone, with respect to an earphone. FIG. 16 is an enlarged external view of an
earphone portion of binaural recording and noise cancellation headphones according to the
second embodiment and a diagram when functioning as a noise cancellation headphone. It is an
external view of binaural recording and noise cancellation headphones. FIG. 17 is an external
view of an earphone portion of the binaural recording and noise canceling headphone according
to the second embodiment and is a diagram when functioning as a binaural recording
microphone. FIG. 18 is an external view of an earphone portion of binaural recording and noise
cancellation headphones according to a third embodiment, illustrating a state of functioning as
noise cancellation headphones. FIG. 18 is an external view of an earphone portion of a binaural
recording and noise canceling headphone according to a third embodiment and is a view when
functioning as a binaural recording microphone. FIG. 21 is an external view of an earphone
portion of binaural recording and noise cancellation headphones according to a fourth
embodiment and is a diagram showing a state of functioning as noise cancellation headphones.
FIG. 21 is an external view of an earphone portion of a binaural recording and noise canceling
headphone according to a fourth embodiment and is a diagram when functioning as a binaural
recording microphone. It is a sectional view of the earphone part of a general inner type noise
cancellation headphone
Explanation of sign
[0046]
Reference Signs List 30 binaural recording and noise canceling headphones 33 main casing 34
speaker casing 35 pinnacle insertion portion 38 connecting shaft 39 sound output hole 40 sound
conduction tube 41 microphone 42 speaker 45 speaker portion sound passing hole 50a, 50b
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convex portion 51a to 51c concave portion 53 main body Casing 54 Microphone casing 55
Speaker casing
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