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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1a to FIG. 1e show a conventional example, a, b
and C are front views, d is a perspective view, and e is a sectional view, and FIG. 2 is used for the
system of the present invention. Fig. 3 is a sectional view showing an ear speaker microphone,
Fig. 3 is a perspective view showing an auricle, Fig. 4 is a partially broken view showing a
mounting state of the ear speaker microphone of Fig. 2 to the auricle. Fig. 5 is a circuit diagram
showing a sound pickup and reproducing apparatus system according to the present invention,
Fig. 6 is a view showing a state in which a pair of ear speaker microphones of the system of Fig.
5 is attached to both ears, FIG. 8 is a circuit diagram showing a modification of a part of the
circuit of FIG. 5, and FIG. 8 is a graph showing the characteristics of the equalizer amplifier in
FIG. '30 ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии 30 ииииии Ear speaker microphone, 40a, 40 b ииииии Ear
speaker microphone, 42 ииииии Ear speaker microphone switching mechanism. 410, alh ',', 42a 43
eyes-or juice Jl 44b-Lee " ?
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound collecting
and reproducing apparatus system which enables simultaneous conversation among a plurality
of users. In such a conventional system, a speaker microphone as shown in FIG. 1 (IL) to (0) is
used to conduct simultaneous conversations between users, and typical ones are (ILI and (B)
Head unit yr, generally called ?In-Cam?, consists of a combination of close-talking microphone
1 and headphones 2 or earphones 3 'lv, for business contact in radio studios, baseball broadcasts,
etc. used. By the way, all these headsets have the head hand 4 and the bandt 4) has a structure to
obtain pressing force on the ears and side head, so the wearing feeling is not good and the
wearing property is unstable. The microphone 1 is attached to the end of the 7-m5 which
extends from the head band +4 to the face of the face, which is bothersome and difficult to attach
and detach. In particular, in the case of holding the earphone by inserting the acoustic tube at the
front of the Sleica Uninoto like the bl to the ear canal hole, the acoustic tube can be easily
removed from the ear canal, and its use feeling is not good. ????????????????
????? On the other hand, as shown in FIGS. 1 (C) and 1 (d), in the case where the speaker
10 and the microphone 11 are built in the same housing 12, /, due to the structure, the
transmitting / receiving switch 13 is used with one hand. It is inconvenient in situations where
you must operate and use both hands. ?????????????? Further, as shown in FIG.
1 (e), a vibration pin having a weight 21 attached to one end of the piezoelectric element 20, a
speaker comprising a quano-knob type external ear canal microphone and a sound generator 22
has a sound hole 23 & The speaker built-in ear canal microphone, which is embedded in the ?plug 23 and attached to the sheath 25 from which the coat 24 is drawn, is used under high noise
and under special circumstances. Since the ear flag 23 is inserted into the external auditory canal
to collect bone conduction sound, the feeling of use is poor (and there is also an impedance
conversion circuit other than the 1 JL source for driving the pressure ' Admittedly, the structure
is also complicated. In the above-described headset, handset and speaker # 1. Each type of
microphone p-phone is used for special, specialized, and r57 applications, so from the standpoint
of a general user who is listening with a sound collection device such as a radio cassette, In the
situation where you want to have a conversation, the above mentioned things are difficult to
In short, in the prior art, the ear speaker is held by pressing or hooking the ear speaker to the ear
with a pressing force or a pulling force of the hand, or by using the insertion holding force of the
ear plug into the ear hole. However, in the case of the former, a pressing force or a pulling force
is applied to the ear, and in the case of the latter, a local external pressure is applied to the
pressing portion. Although it is unavoidable (in the case of hunt seven nodes, there is no such
discomfort at the time of wearing as described above), there is an inconvenience that one hand is
closed. 7. The present invention has been made in view of the above-mentioned points, the
purpose of the purpose is that there is no discomfort at the time of wearing, moreover, when one
hand is closed It is an object of the present invention to provide a sound pickup reproduction
system using An embodiment of the present invention will be described with reference to FIGS. 2
to 8. FIG. 2 shows an ear speaker microphone used in a book collecting device, and 30 is a
selective speaker unit or microphone unit. The electrodynamic unit is operated as a speaker unit,
and when it is operated as a speaker unit, an alternating current signal is supplied to the coil
disposed in the magnetic cap of the magnetic circuit to vibrate the coil and the fine movement
plate connected thereto to generate sound. When the microphone unit is operated, the
diaphragm and the coil connected thereto are lifted by the sound from the outside to generate an
AC signal corresponding to the sound in the coil. 31 is a case having a front plug hole 31a and a
rear sound hole 31b. The above-described electrodynamic uni, y) 30 determined at time t1, and
the sound absorbing material 32 fixed to the rear sound hole 31b side are accommodated. A
cover 33 made of a foamed elastic material or the like is closed on the front surface of the
manual case 31 so as to close the front sound hole 3 + l L'r, and the cord 34 connected to the
electrodynamic unit 30 is on the surface of the case 31011 It is pulled out. This ear speaker fist
microphone ? phone may be attached to the constriction of the concha cavity d between the ear
gb and the cutting stock C, just before the entrance of the ear canal a of the auricle shown in FIG.
And-The shape and size of the ear canal can be held by the elastic force and the abrading force of
the earlobe of the above 5 toes and the cutting blade 0, and the case of the embodiment The
diameter is j5m +, U is made a flat cylindrical shape of 10 cabinets. When the ear speaker and
microphone of the above-described configuration are fitted and mounted together with the case
31 in the depressed portion of the concha cavity d, the cover 33 on the front of the case 31 is, as
shown in FIG. j is deformed to conform to the shape of the concha cavity d, and is attached to the
mounting part of the auricle, as an eyebrow (n.
When it works as an ear speaker with the ear speaker and microphone as described in FIG. 2 or
the ear shield as shown in FIG. 4, it is generated by the peristaltic movement of the navigation
plate of the unit in case 31 The sound is conducted to the ear canal through the cover 33. It is
heard by vibrating the tympanic membrane e in the back of the ear canal a. On the other hand,
when working as a microphone, the sound emitted from the wearer's mouth is! It is transmitted
to the Wb plate in the case along a path shown by "m" and "B" and "C" in FIG. 4 and is converted
into an electric signal by a coil which is moved along with the diaphragm. The voice is
transmitted from outside of the head from the air propagation rod in the path of the arm, and the
path of B is transmitted from the inside of the head into the outer ear by itself and the path of the
heart ? in the path of C It is transmitted as bone conduction sound by solid propagation. Figure
5 shows the circuit of the sound collecting and reproducing apparatus system according to the
present invention, which comprises the plurality of pairs of ear heaker microphones 40,... 40n
described above in FIG. The microphones 401 and 40b are respectively attached to both ears of
the user who participates in the conversation by this system as shown in FIG. In this case, one
40L of each pair of ear speaker microphones is connected to the output of one ear speaker drive
amplifier 411L via a volume resistor VR so as to work as an ear speaker, and the other 40 b is an
ear speaker or microphone In order to move selectively as 1, it is selectively connected to the
output of the other ear speaker drive amplifier 41 b or the manual power of the microphone 7
43 by the switch 421 L of the ear speaker / microphone switching mechanism 42. The human
power of the above-mentioned one speaker driving circuit 41 & is operated by the switch 42b
interlocked with the switch 42m of the switching mechanism 42,-10,000 preamps 44! The
output of L and the output of the microphone amplifier 43 are selectively connected, and the
input of the other speaker drive 0) and the input amplifier 41b are directly connected to the
output of the other preamplifier 44b, and the inputs of both pre-ups 44L and 44b Is connected to
a sound source 45 such as a tape, a ken-hi, a radio, and a record. The resistors R1VR2 and VR1
are resistors connected to the outputs of the speaker drive amplifier 41b and the microphone
amplifier 43, respectively. In the above-described stem, when the movable contacts of both the
switches 421 and 42b are on the fixed contact S side as illustrated, each pair of both-ear speaker
microphones 401L and 40b work as an ear speaker. The ear-speaker microphones 4 (l and 40b
can hear the stereo sound of the sound source 45) mounted on both ears.
When both switches 421L and 42b are switched from the fixed upper point S to 11 shown in the
figure to the fixed drop point noodle side, an electric signal from the sound source 45 is applied
to the both ear speaker e microphone p phone 40111M and the drop 40b. When the user
wearing the other pair of ear speaker microphones speaks to one of the ear speaker microphones
40a, the radio frequency signal generated by the other ear speaker microphone 40b is a
microphone 7 It is amplified to an appropriate level by the nop 43 and the speaker drive 7 amp
41a to be applied. Thus, simultaneous conversations between multiple users are enabled. By the
way, the ear speaker microphone shown in FIG. 2 is close to the ear and the output sound
pressure frequency characteristic is the eardrum surface in the case where HiFi reproduction is
performed with the ear speaker microphone attached to the concha cavity. If it is desirable to be
obtained in the above 2 ') or if it is made to work as a microphone, the low frequency range is
retained due to the closing of the external auditory canal at the time of sound collection. Due to
the size of the listening board, the clarity is reduced, and it is preferred that the output sound
pressure frequency characteristics of the ear speaker be <not preferred. In order to solve such a
problem, as shown in FIG. 7, it is preferable to insert an Ikofissa 7 having a frequencyless
characteristic such as that shown in Section 8 in the previous stage of the microphone amplifier
43. Since the present invention is configured as described above, many effects described below
are rumored. tl + Earspeaker-Figrophone is small, light and kept at a temperate level. (2 (Ear
speaker microphone-poon can be used as a microphone in a state where it is attached to the
concha cavity 3... 9 ? ?, and it can be used as a microphone, and a new external microphone is
not necessary. + 31 (Because the Yashi force и The microphone is held by the natural elastic force
of a part of the pinna, there is a good feeling of use because an excessive force is exerted on the
mounting portion. (4) The unit of the ear speaker and microphone is very close to the ear hole, so
there is little escape of sound to the outside (It is efficient and it is good to take air in the ear
canal. Dohon: Dohon: C is more efficient. (5) When the ear speaker and the microphone work as a
microphone, there is very little leakage of sound to the outside of the ear hole, and the air
conduction sound can be effectively squirted, and the microphone unit has an ear pin 42 ~. -Solidborne sound can be effectively pizoqua, because it is held in direct contact with the cartilage
through the skin of the in-portion.
In particular, in the case of using a static type 22, the power supply and the impedance 4i circuit
become unnecessary. (6) A 1-to-2 is connected to the outside of the case 2 ', and the mounting
and holding can surely be made in line 7.1 :. (7) Finally, if the sound collecting and reproducing
apparatus has a recording function, it is possible to play hacks after recording and listen to the
contents of the conversation.
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description, jps5741380
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