JP2007214883A - Receiving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a receiving device which has a light weight, is easy to wear, effectively works as an active silencer without giving burden to a user, and at same time, with which the user can clearly listen necessary information. <P>SOLUTION: A voice signal can be heard by bone conduction in a condition that noise is reduced by receiving surrounding noise by a noise receiving unit 8, creating a signal of an inverse phase from the noise phase by a circuit unit 14, and vibrating a vibration component 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a receiver that is suitable for clearly listening to an audio signal even in a noisy environment.

  In recent years, various receivers for listening to audio signals in a noisy environment have been developed. For example, a receiving device that includes an ear muff that covers the entire ear and is sound-insulated, and an electromagnetic speaker mounted therein has been proposed. A system has also been proposed in which a pair of ear muffs with a speaker inside is attached to the headband, and a device with a microphone attached to the headband is connected to the mobile phone, so that the mobile phone can easily talk even under noisy conditions. ing. Such a receiver is disclosed in Patent Document 1.

  In addition, it consists of an ear muff, a speaker installed inside the ear muff, a directional microphone arranged outside the ear muff, and a control circuit. When the user talks with the other party, the surrounding area picked up by the directional microphone There has also been proposed an ear device that facilitates conversation by performing filtering control according to the environmental sound conditions. Such a receiver is disclosed in Patent Document 2.

  Furthermore, a receiving device has also been proposed for a subject in an MRI apparatus under high noise to have a conversation with an outside operator. This receiving device is a receiving device in which a bone conduction speaker and a bone conduction microphone are mounted inside an ear muff, and a conversation is conducted with bone conduction sound instead of air conduction sound with the ear completely closed.

  FIG. 1 is a perspective view of a conventional receiver. The conventional receiving device 20 uses a bone conduction microphone 21 made of a transmitting piezoelectric element and a bone conduction speaker 22 made of a receiving piezoelectric element. The bone conduction microphone 21 and the bone conduction speaker 22 are incorporated into a headphone-type sound insulation earmuff 23.

  Among these, the bone conduction microphone 21 is arranged at a substantially central portion of the ear pad 24 of the sound insulation ear muff 23, that is, a portion corresponding to a general user's ear hole, and when the user wears the sound insulation ear muff 23, The distal end portion of the bone conduction microphone 21 is configured to be inserted into the user's ear canal. Further, the bone conduction speaker 22 is housed in a location corresponding to a general user's auricle peripheral portion inside the ear pad 24.

  The bone conduction microphone 21 and the bone conduction speaker 22 have their respective operation surfaces directly on the user's head or through a protective member (not shown) made of a protective cover, cushioning material or the like when the sound insulation earmuff 23 is attached. Built in contact. The contact pressure is set by the material and structure of the headband 28 that connects the left and right housings 27 of the sound insulation earmuff 23.

  FIG. 2 is a cross-sectional view of a conventional piezoelectric bone conduction speaker. As shown in the figure, the conventional bone conduction speaker 22 holds the entire periphery of a disk-shaped piezoelectric bimorph element 71 with an elastomer material 72. When an electroacoustic signal is input to the piezoelectric bimorph element 71, mechanical vibration due to bending occurs. This vibration is transmitted to the vibrating body 73 via the transmission member 76 to vibrate the vibrating body 73. The elastomer material 72 is supported by a support member 75 fixed to the inner surface of the case 74. The piezoelectric bimorph element 71 is housed in the case 74, and the surface of the vibrating body 73 is disposed outside the case 74. Further, the bone conduction microphone 21 has the same configuration and has a function of converting mechanical vibration into an electroacoustic signal. Such a receiver is disclosed in Patent Document 3.

Registered Utility Model No. 3023116 Japanese Patent Application No. 8-509472 JP 2005-245580 A

  As described above, as a voice information transmission system that transmits and receives only necessary information under noise, an earpiece using a sound insulation earmuff and a speaker mounted therein has been proposed. However, earmuffs having a heavy sound insulation wall are used for these receivers. Therefore, there is a problem that the weight increases. Further, since the weight of the speaker is further increased in addition to this weight, it becomes a heavy burden for the user to wear it for a long time.

  Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art. Specifically, it is an object of the present invention to provide a receiver that can be listened to necessary information clearly and simultaneously with effective active silencing without being burdened on a user, being lightweight and easy to wear.

  The present invention employs the following means in order to solve the problems of the prior art. That is, the present invention employs an active silencer comprising an earphone-type receiver and a microphone that captures ambient sounds, and an acoustic vibration comprising a piezoelectric bimorph-type vibrating body coated with an organic material connected thereto. The gist is to do.

  According to the present invention, an audio receiver that receives an audio signal or an audio signal that has been electrically converted and outputs an electric audio signal; and a received audio signal amplifier that amplifies the electric audio signal and outputs an amplified electric audio signal; A receiving path comprising a vibration member that generates sound vibration in response to the amplified electrical sound signal, a transmission member that is joined to the vibration member and has a shape that can be inserted into the ear canal, and receives noise and outputs a noise signal A noise receiving unit, a phase inversion control unit that outputs a negative phase noise signal having a phase opposite to that of the noise signal, the vibration member that generates a negative phase noise vibration in response to the negative phase noise signal, and the transmission A silencing path composed of a member, the transmission member that transmits bone conduction sound generated around the ear to the vibration member due to sound emitted by a user, and the vibration member that outputs a transmission sound signal corresponding to the bone conduction sound; Send consisting of Reception device is obtained, characterized in that it comprises a road.

  The present invention provides a reception path composed of a voice receiving unit, a received voice signal amplifying unit, a vibrating member, and a transmission member as means for listening to voices uttered by a partner or a voice signal from a cellular phone that has already been electrically converted. Provide. In this reception path, the voice receiving unit has a function of receiving a voice uttered by a partner intended for listening and a voice signal from a mobile phone that has already been electrically converted, and outputting the signal as an electric voice signal. The reception audio signal amplification unit has a function of converting and amplifying the electric audio signal output from the audio reception unit into an optimum state for listening and outputting an amplified electric audio signal. The vibration member is an electro-mechanical conversion device that converts the amplified electric sound signal into sound vibration, and is preferably small, lightweight, and has a large displacement and generating force. The transmission member is joined to the vibration member and has a shape that can be inserted into the ear canal. The sound vibration generated by the vibration member by the amplified electric sound signal imparts vibration to the ear canal via the transmission member. This vibration becomes a bone-conducted sound, and the user can listen to the sound emitted by the other party and the sound from the mobile phone.

  In normal cases, it is possible to listen to the voice only by the reception path, but in a noisy environment, the noise hinders the listening of the voice, so that the performance of the receiver is insufficient. Therefore, in the present invention, a silencing path including a noise receiving unit and a phase inversion control unit is provided as an active silencing unit that actively reduces noise.

  In the mute path, the noise receiving unit is composed of a microphone that is mounted near the user's ear, detects noise existing in the surrounding environment that reaches the vicinity of the user's ear, and outputs the detected noise as an electrical signal. The phase inversion control unit analyzes the electrical signal output from the noise receiving unit, and converts the electrical signal having an opposite phase voltage that is 180 degrees different from the phase of the voltage of the electrical signal. Outputs a phase noise signal.

  This antiphase noise signal vibrates the vibrating member. At this time, the vibration generated by the vibration member vibrates the transmission member, but this vibration vibrates in the opposite phase to the phase of noise entering the ear canal from the surrounding environment. There is an effect of canceling each other, and noise is reduced or eliminated.

  Furthermore, in the present invention, in addition to the reception path for transmitting the voice uttered by the other party and the voice signal from the mobile phone to the user, a transmission path for transmitting the voice uttered by the user to the other party is provided. In this transmission path, the vibration generated around the ear by bone conduction when the user utters sound is transmitted to the vibration member via the transmission member. The vibration member has a function of outputting a transmission voice signal corresponding to the vibration.

  According to the present invention, the reception path, the muffling path, and the transmission path are included, and the noise reception section, the vibration member, and the transmission member constitute an integral bone conduction earphone section, and the bone A conductive earphone unit transmits the sound vibration generated by the vibration member to the ear canal via the transmission member, and reduces the noise by the anti-phase noise vibration. .

  The present invention provides a small and light receiving device by forming a bone conduction earphone unit by integrating the noise receiving unit, the vibration member, and the transmission member in the reception path, the mute path, and the transmission path. It becomes. In order to integrate the noise receiving unit, the vibration member, and the transmission member, the members may be joined via a joining member, but the members may be molded together with a resin and integrated.

  According to the present invention, it is possible to obtain a receiving device characterized in that the bone conduction earphone unit forms a pair, and at least one of the bone conduction earphone units is the transmission path. In the present invention, in addition to the reception path for transmitting the voice uttered by the other party and the voice signal from the mobile phone to the user, a transmission path is provided for transmitting the voice uttered by the user to the other party. As the means, the bone conduction earphone unit is used.

  A bone conduction sound transmitted to the external auditory canal when a user utters a sound is transmitted to the vibration member via the transmission member, and the vibration member is vibrated. The vibration member is provided with a mechanical-electrical conversion function to obtain an electrical signal output corresponding to the bone conduction sound. By amplifying this electric signal and outputting it to a speaker, a receiving device or the like, it is possible to transmit the voice produced by the user to the other party. That is, the bone conduction earphone unit is a receiving device that also serves as a bone conduction microphone.

  In addition, the bone conduction earphone unit is paired so that the user can wear it on the left and right ears. At this time, the bone conduction earphone part that also serves as the bone conduction microphone serving as the reception path may be either left or right, but may be both.

  According to the present invention, the bone conduction earphone part is joined to the end of the vibration member made of a piezoelectric bimorph element or a piezoelectric unimorph element whose surface is covered with an organic material via a joining member, The noise receiving unit is fixed to a surface other than the surface to be inserted into the ear canal of the transmission member.

  In the present invention, as the vibration member, a piezoelectric bimorph element or a piezoelectric unimorph element having an electro-mechanical conversion function and a mechanical-electrical conversion function and having a small size and light weight and a large amount of displacement and generation force is used. A piezoelectric bimorph element is an element formed by joining two piezoelectric ceramic plates via an elastic plate, and a piezoelectric unimorph element is an element formed by bonding a piezoelectric ceramic plate to an elastic plate. Both generate displacement and force due to bending deformation according to the electric signal, and when mechanical vibration is applied, an electric signal corresponding to the vibration is output. The entire piezoelectric bimorph element or piezoelectric unimorph element is covered with an organic material such as urethane or silicone to increase strength and weather resistance, and to control vibration characteristics to obtain a vibration member.

  In the present invention, the transmission member is joined to the end portion of the vibration member via a joining member, and the microphone serving as the noise receiving unit is also joined to the transmission member. At that time, the joining position of the microphone may be other than the part where the transmission member is inserted into the ear canal, and it is better to join the part opposite to the part inserted into the ear canal. As described above, the present invention is a receiving device in which the noise receiving unit, the vibration member, and the transmission member are integrated.

  As described above, according to the present invention, it is lightweight and easy to install, and even in a noisy environment without burdening the user, the noise is reduced and muffled by the active mute means, and at the same time, necessary audio information is clearly heard. Therefore, it is possible to provide a receiving device that can transmit.

  The receiver according to the present invention includes a receiving path for listening to a voice uttered by a partner or a voice signal from a mobile phone, a silence path as an active silencer for actively reducing noise, and a voice uttered by the user himself / herself. A transmission path for transmitting to the network. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 3 is a block diagram showing a receiver according to the present invention. The receiver 13 according to the present invention has a reception path for the user to listen to the other party's voice. First, a voice receiving unit 2 is provided for receiving a voice 1 for the user to listen to. If the audio receiving unit 2 receives audio, a device having an acoustoelectric conversion function such as a microphone is used to convert the audio 1 into an electric audio signal. Output. In the case of receiving an audio signal from a mobile phone or other communication device, a device having a function of impedance-converting the audio signal or outputting it directly to the received audio signal amplifier 3 may be used.

  The reception audio signal amplifier 3 amplifies the electric audio signal and outputs the amplified electric audio signal to the vibration member 4. At this time, it is preferable to provide a control circuit such as an equalizer and a volume in the received audio signal amplifying unit 3 so that the user can listen to the audio with the optimum volume and sound quality.

  The vibration member 4 is a device that converts an amplified electric sound signal into sound vibration. As this device, it is preferable to use a piezoelectric bimorph element having an electro-mechanical conversion function which is small and light and has both a large displacement and a large generation force. The vibration member 4 generates sound vibration in response to the amplified electric sound signal. The vibration member 4 is joined to a transmission member 5 having a shape that can be inserted into the ear canal, and the sound vibration is transmitted to the cartilage around the ear canal 6 via the transmission member 5 inserted into the ear canal. The voice or the voice signal can be heard as a bone conduction sound. That is, the vibration member 4 and the transmission member 5 constitute a bone conduction earphone unit.

  In addition, the receiver 13 according to the present invention has a mute path that actively attenuates and eliminates ambient noise that enters the user's external auditory canal 6. First, the noise receiving unit 8 is provided in the mute path. The noise receiving unit 8 has a function of receiving noise and noise 7 existing around the user in the vicinity of the user's ear and outputting them to the phase inversion control unit 9 as an electrical signal. Therefore, the noise receiving unit 8 may be any device that can convert sound called a microphone into an electrical signal.

  The phase inversion control unit 9 analyzes the electrical signal output from the noise receiving unit 8 and has an antiphase voltage signal having an antiphase voltage that is 180 degrees out of phase with the voltage phase of the electric signal. Is output to the vibration member 4. An antiphase noise signal having an antiphase voltage is preferably produced by an inverting amplifier circuit using an operational amplifier. The phase inversion control unit 9 may be provided with a control circuit such as an equalizer and a volume as in the case of the reception audio signal amplification unit 3.

  The vibrating member 4 vibrates according to the antiphase noise signal output from the phase inversion control unit 9. This vibration is transmitted to the transmission member 5 and causes the transmission member 5 to vibrate at a phase opposite to ambient noise or noise that enters the user's external ear canal 6. Therefore, the ambient noise or noise vibration direction that attempts to enter the ear canal 6 and the vibration direction of the transmission member 5 are opposite to each other and cancel each other, and the noise that enters the user's ear canal 6 is attenuated or extinguished.

  Furthermore, the receiver 13 according to the present invention has a transmission path for transmitting the voice that the user has uttered to the other party. The transmission path is configured such that the bone conduction earphone part including the vibration member 4 and the transmission member 5 is used as a bone conduction microphone and is also used as the bone conduction earphone part.

  When the user utters sound, the sound vibrates the cartilage around the ear canal 6 by bone conduction. In the present invention, this vibration is transmitted to the vibration member 4 via the transmission member 5, so that the sound emitted by the user is converted into an electric signal by the vibration member 4 and output as a transmission sound signal. Therefore, the vibration member 4 is also required to have a function of converting mechanical vibration into an electrical signal. In this respect, it is preferable to use a piezoelectric bimorph element for the vibration member 4.

  In the present invention, a transmission audio signal amplifying unit 10 that amplifies and outputs the transmission audio signal output from the vibration member 4 and an audio signal transmission unit 11 that outputs the amplified transmission audio signal to a speaker, a cellular phone, or the like are provided. As a result, convenience as a receiver is improved. The circuit unit 14 including the reception audio signal amplification unit 3, the phase inversion control unit 9, the transmission audio signal amplification unit 10, and the audio signal transmission unit 11 can be configured on a single circuit board.

  Hereinafter, a specific example is given and the receiver of this invention is demonstrated in more detail.

  FIG. 4 is an explanatory diagram illustrating the basic configuration of the receiver according to the embodiment. The receiver 13 according to the present embodiment includes a bone conduction earphone unit 31 including a vibration member 4, a noise receiving unit 8, and a transmission member 5 integrated by a joining member 15, a circuit unit 14, and a voice receiving unit 2. Become. The bone conduction earphone unit 31 and the voice receiving unit 2 are connected to the circuit unit 14. Two bone conduction earphone parts 31 were provided so that the user can wear them on both ears.

  In this embodiment, the voice receiving unit 2 is composed of a capacitor microphone and an FET amplifier circuit so that the user can receive the voice 1 of the other party, the voice signal output from the mobile phone or the acoustic device. The voice 1 and the voice signal are received by the voice receiver 2, converted into an electric voice signal as a received voice signal, and output to the circuit unit 14. This electric audio signal is amplified by an amplifier circuit provided in the circuit unit 14 to become an amplified electric audio signal, and is output to the vibrating member 4 through the connection cord 16.

  FIG. 5 is a cross-sectional view of the vibration member according to the embodiment. In this embodiment, a piezoelectric bimorph element 19 is used as the vibration member 4. The piezoelectric bimorph element 19 is obtained by joining two piezoelectric ceramic plates 17 via an elastic plate 18. Specifically, the piezoelectric ceramic plates (trade name Nepec 10) manufactured by NEC TOKIN Corporation were used for the two piezoelectric ceramic plates 17, and the dimensions were 30 mm in length, 3 mm in width, and 0.2 mm in thickness. . The elastic plate 18 was a brass plate having a thickness of 50 μm, and the length and width thereof were almost the same as those of the piezoelectric ceramic plate 17. These were bonded together with an epoxy adhesive, and an electrode was provided on the outer main surface of the piezoelectric ceramic plate 17, and wiring was performed between the electrode and the elastic plate 18 so that the amplified electrical audio signal was input. The electrodes and wiring are not shown.

  In this embodiment, the piezoelectric ceramic plate 17 is a laminated piezoelectric ceramic plate in which four layers of ceramic sheets on which an internal electrode having a thickness of 50 μm is printed are laminated in the thickness direction and integrally fired. Further, the internal electrodes are divided into two groups for each layer, and the structure is such that polarization and voltage application can be performed for each layer. This configuration has the advantage that the drive voltage can be greatly reduced.

  The entire surface of the piezoelectric bimorph element 19 was covered with the organic material 32 to form the vibration member 4. Liquid urethane rubber was used for the organic material 32, and a coating layer was formed with a thickness of about 2 mm on two surfaces in the thickness direction.

  The vibration member 4 generates mechanical vibration due to bending in accordance with the amplified electrical audio signal. This mechanical vibration is transmitted to the transmission member 5 as audio vibration through the joining member 15 shown in FIG.

  FIG. 6 is a perspective view of the bone conduction earphone unit according to the embodiment. In the bone conduction earphone unit 31 according to the present embodiment, the noise receiving unit 8 and the transmission member 5 are joined to one end of the vibration member 4 through the joining member 15 formed of resin. The transmission member 5 has a curved surface that can be easily inserted into the ear canal.

  FIG. 7 is an explanatory diagram illustrating a usage state of the bone conduction earphone unit according to the embodiment. The bone conduction earphone unit 31 is attached to the user's ear 30 as shown in FIG. At this time, the transmission member 5 is inserted into the ear canal, and the vibration of the vibration member 4 transmitted to the transmission member 5 vibrates the cartilage around the ear canal. This vibration propagates to the inner ear by bone conduction and makes the user recognize the voice 1 or the voice signal from the mobile phone emitted by the other party.

  On the other hand, in this embodiment shown in FIG. 4, a small condenser microphone is used for the noise receiver 8. Ambient noise or noise that reaches the vicinity of the user's ear received by the noise receiving unit 8 is converted into an electric signal by a condenser microphone as a noise signal and output to the circuit unit 14 through the connection cord 16. The noise signal is inverted and amplified by a phase inversion control circuit including an inverting amplifier circuit using an operational amplifier in the circuit unit 14 to be an antiphase noise signal, and is output to the vibrating member 4 through the connection cord 16. The connection cord 16 has a multi-core structure, and the noise signal line for transmitting the noise signal and the anti-phase noise signal line for transmitting the anti-phase noise signal use different core wires.

  The antiphase noise signal output from the phase inversion control circuit excites the vibration member 4 and further vibrates the transmission member 5 via the joining member 15. This vibration is exactly 180 degrees out of phase with the vibration of the sound of ambient noise and noise reaching the user's ear, so the ambient noise and noise reaching the user's ear are actively attenuated and extinguished. Has the effect of Therefore, the user can listen to the voice or the voice signal clearly.

  Furthermore, in this embodiment, the vibration of the head caused by the voice uttered by the user is transmitted to the vibration member 4 via the transmission member 5 via the ear canal, so that the voice uttered by the user can be transmitted to a third party. The composition is to convey. By forming the transmission member 5 so as to be in close contact with the inner wall of the ear canal, it is possible to efficiently transmit the vibration of the head generated by the voice transmitted by the user transmitted to the ear canal to the vibration member 4. The vibration transmitted to the vibration member 4 causes a piezoelectric phenomenon in the piezoelectric bimorph element 19 constituting the vibration member 4, and the piezoelectric bimorph element 19 generates a voltage corresponding to the transmitted vibration. This voltage is amplified by the transmission audio signal amplifier circuit provided in the circuit unit 14 through the connection cord 16 and output as an audio signal from the audio signal transmission unit. The audio signal is output to the audio output unit 12 such as a speaker or an audio device and converted into audio, so that the audio generated by the user is transmitted to a third party.

  In this embodiment, since the transmission member 5 is inserted into the ear canal, the vibration member 4 converts only the bone conduction sound emitted by the user via the transmission member 5 into an audio signal, and does not convert the ambient environmental sound. Therefore, the third party can clearly hear the voice uttered by the user.

  In this embodiment, the piezoelectric bimorph element has a laminated structure in order to reduce the driving voltage, but may have a single plate structure if there is no problem with voltage. The use of the state in which the vibration member receives a sound signal and the state in which the sound signal emitted by the user is output can be automatically changed by detecting vibration caused by the sound emitted by the user. Alternatively, it can be switched manually. In addition, one of the two left and right bone conduction earphone units may be set exclusively for receiving and the other may be set exclusively for transmitting.

  In the present embodiment, the vibration member, the noise receiving unit, and the transmission member are integrated into a bone conduction earphone unit, but in some cases, the noise receiving unit is separated and attached to a place other than the vicinity of the user's ear. Also good. Moreover, another bone conduction microphone may be prepared for the voice uttered by the user, and may be attached to a site where bone conduction sound by the voice uttered by the user can be received.

  As described above, according to the present invention, it is lightweight and easy to install, does not give a burden to the user, and even in a noisy environment, the noise is reduced or silenced by the active silencer, and at the same time, necessary voice information is clarified. It is possible to provide a receiver that can listen and transmit.

  The receiving device according to the present invention can be used not only as a receiving device for transmitting and receiving audio signals in a noisy environment, but also for transmitting and receiving audio from audio devices and portable terminal devices.

The perspective view of the conventional receiver. Sectional drawing of the conventional piezoelectric bone conduction speaker. The block diagram which shows the receiver according to this invention. Explanatory drawing which shows the basic composition of the telephone receiver by an Example. Sectional drawing of the vibration member by an Example. The perspective view of the bone conduction earphone part by an Example. Explanatory drawing which shows the use condition of the bone-conduction earphone part by an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Audio | voice 2 Audio | voice reception part 3 Reception audio | voice signal amplification part 4 Vibration member 5 Transmission member 6 Ear canal 7 Noise 8 Noise reception part 9 Phase inversion control part 10 Transmission audio | voice signal amplification part 11 Audio | voice signal transmission part 12 Audio | voice output parts 13 and 20 Device 14 Circuit portion 15 Joining member 16 Connection cord 17 Piezoelectric ceramic plate 18 Elastic plates 19, 71 Piezoelectric bimorph element 21 Bone conduction microphone 22 Bone conduction speaker 23 Sound insulation ear muff 24 Ear pad 27 Housing 28 Headband 30 Ear 31 Bone conduction earphone portion 32 Organic material 72 Elastomer material 73 Vibrating body 74 Case 75 Support member 76 Transmission member

Claims (4)

  An audio receiving unit that receives an audio signal or an audio signal that has been electrically converted and outputs an electric audio signal; a received audio signal amplification unit that amplifies the electric audio signal and outputs an amplified electric audio signal; and the amplified electric audio signal And a receiving path composed of a vibrating member that generates sound vibration according to the above, a transmission member having a shape that can be inserted into the ear canal and joined to the vibrating member, a noise receiving unit that receives noise and outputs a noise signal, A muffler path comprising a phase inversion control unit that outputs a negative phase noise signal having a phase opposite to the phase of the noise signal, the vibration member that generates a negative phase noise vibration in response to the negative phase noise signal, and the transmission member And a transmission path composed of the transmission member that transmits bone conduction sound generated around the ear to the vibration member by the sound emitted by the user, and the vibration member that outputs a transmission sound signal corresponding to the bone conduction sound. Have Receiving apparatus according to claim.   The reception path, the muffling path, and the transmission path, the noise receiving section, the vibration member, and the transmission member form an integral bone conduction earphone section, and the bone conduction earphone section is A voice receiving apparatus, wherein the voice vibration generated by the vibration member is transmitted to an external auditory canal via a transmission member, and the noise is reduced by the reverse-phase noise vibration.   The receiving device according to claim 2, wherein the bone conduction earphone unit forms a pair, and at least one of the bone conduction earphone units is the transmission path.   The bone conduction earphone part is joined to the end part of the vibration member made of a piezoelectric bimorph element or a piezoelectric unimorph element whose surface is covered with an organic material via a joining member, and the noise receiving part is the transmission part The receiving device according to claim 2 or 3, wherein the receiving device is fixed to a surface other than a surface inserted into the ear canal of the member.

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