JP6602987B2 - Hearing aids - Google Patents

Description

  The present invention relates to a hearing aid device, and more particularly, to a hearing aid device that can be used with a main body part placed on an ear and can be heard by one or both ears.

  As a general hearing aid that has existed conventionally, roughly, a pocket type hearing aid that houses the main body in a breast pocket, an ear-type hearing aid that puts the main body on the ear, an ear hole type hearing aid that inserts the main body into the ear hole, There is.

  A pocket type hearing aid is used by connecting a relatively large main body and an earphone via a wiring. Since a pocket type hearing aid can include a large battery, the output can be increased and the frequency of battery replacement can be reduced. Such a pocket type hearing aid is described in Patent Document 1, for example.

  The ear-mounted hearing aid is light and small enough that the main body can be put on the ear, so that the entire device is compact. Furthermore, the volume and the like can be easily operated by operating a dial or the like disposed at the rear of the main body. Such a hook-type hearing aid is described in Patent Document 2, for example.

  In the ear hole type hearing aid, since most of the device including the main body is accommodated in the ear hole, the hearing aid becomes further compact and the burden on the user can be reduced. Such an ear hole type hearing aid is described in Patent Document 3, for example.

JP 2002-369295 A JP 2010-124446 A JP 2001-128297 A

  However, the above-described pocket-type hearing aid has a problem that the burden on the user is large because the main body itself is relatively large.

  In addition, although the ear-type hearing aid is compact, the burden associated with carrying is relatively small, but it is used only for one ear, so it is difficult for the user to know the position of the sound source of the external sound. . In addition, it is conceivable to put on-ear hearing aids in both ears as a countermeasure, but doing so increases the cost and effort required to introduce and maintain the hearing aids, and further adjusts the volume and balance. Problems such as complications arise.

  Furthermore, even with the ear hole type hearing aid, as with the ear hook type hearing aid, when ear hole type hearing aids are attached to both the left and right ears, there is a problem that the cost for introducing and maintaining the hearing aid increases.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hearing aid apparatus that can be hearing with the left and right ears and that can easily adjust the volume and the like. It is in.

  The hearing aid apparatus according to the present invention includes a first microphone unit that converts an external sound that can be heard from one side into a first electrical signal, and a first amplified electrical signal that is generated by amplifying the first electrical signal. A first speaker unit that converts the sound into an audio signal; a first mounting unit that is mounted on one ear of the user; and a second microphone that converts external sound heard from the other side into a second electric signal. And a second speaker unit that converts the second amplified electric signal generated by amplifying the second electric signal into a second audio signal, and is worn on the other ear of the user A second mounting section; a first amplifier circuit that amplifies the first electric signal into the first amplified electric signal; a second amplifier circuit that amplifies the second electric signal into the second amplified electric signal; A power supply unit for supplying current to the first amplifier circuit and the second amplifier circuit; The main body has a size and a shape that can be hung on one ear of a user, the first mounting portion is connected to the main body via a first wiring, and the second The mounting portion is connected to the main body portion via a second wiring.

  In the hearing aid apparatus according to the present invention, a volume adjustment unit that adjusts an amplification degree of the first audio signal or the second audio signal is provided at a rear portion of the main body.

  In the hearing aid device according to the present invention, the second amplifier circuit does not generate the second amplified electrical signal when the second wiring is not connected to the main body.

  Moreover, in the hearing aid apparatus according to the present invention, the connection portion with the first wiring is disposed on the upper end side of the main body portion, and the connection portion with the second wiring is detachable on the lower end side of the main body portion. It is characterized by being arranged.

  In the hearing aid apparatus according to the present invention, the second wearing part is detachably connected to the main body part via the second wiring.

  The hearing aid apparatus according to the present invention includes a first microphone unit that converts an external sound that can be heard from one side into a first electrical signal, and a first amplified electrical signal that is generated by amplifying the first electrical signal. A first speaker unit that converts the sound into an audio signal; a first mounting unit that is mounted on one ear of the user; and a second microphone that converts external sound heard from the other side into a second electric signal. And a second speaker unit that converts the second amplified electric signal generated by amplifying the second electric signal into a second audio signal, and is worn on the other ear of the user A second mounting section; a first amplifier circuit that amplifies the first electric signal into the first amplified electric signal; a second amplifier circuit that amplifies the second electric signal into the second amplified electric signal; A power supply unit for supplying current to the first amplifier circuit and the second amplifier circuit; The main body has a size and a shape that can be hung on one ear of a user, the first mounting portion is connected to the main body via a first wiring, and the second The mounting portion is connected to the main body portion via a second wiring. Therefore, the external sound that can be heard from one side passes through the first microphone part of the first mounting part, the first amplifier circuit of the main body part, and the first speaker part of the first mounting part, as an amplified first audio signal, The user can hear with one ear. In addition, the external sound heard from the other side passes through the second microphone part of the second mounting part, the second amplifier circuit of the main body part, and the second speaker part of the second mounting part, as an amplified second audio signal, The user can hear with the ear on the other side. Therefore, the user can not only hear the amplified external sound but also know the direction of the external sound, and can avoid danger in life.

  Furthermore, in the present invention, since the main body portion has a size and a shape that can be hung on the user's ear, it is possible to suppress annoyance even when used for a long time. Furthermore, since the second mounting portion is detachably connected to the main body portion via the second wiring, the 22nd mounting portion is removed from the main body portion and used with one ear using only the first mounting portion. You can also

  Furthermore, by pulling out the second wiring from the main body without any special switch operation, hearing can be performed with only one ear, so even if the user is an elderly person, it is easy to switch from binaural to single-ear hearing. Can be migrated to.

  In the hearing aid apparatus according to the present invention, a volume adjustment unit that adjusts an amplification degree of the first audio signal or the second audio signal is provided at a rear portion of the main body. Therefore, the user can easily adjust the amplification degree of the first audio signal or the second audio signal by operating the volume adjusting unit disposed at the rear of the main body.

  In the hearing aid device according to the present invention, the second amplifier circuit does not generate the second amplified electrical signal when the second wiring is not connected to the main body. Therefore, while the second mounting portion is not connected via the second wiring, the second amplifier circuit does not substantially operate, thereby reducing the power consumed by the entire device and extending the life of the power source. Can do.

  Moreover, in the hearing aid apparatus according to the present invention, the connection portion with the first wiring is disposed on the upper end side of the main body portion, and the connection portion with the second wiring is detachable on the lower end side of the main body portion. It is characterized by being arranged. Therefore, only by pulling out the second wiring from the main body portion attached to the user's ear, the second mounting portion 2 is detached from the main body portion, and only the first mounting portion connected via the first wiring is provided. Can be used for hearing with one ear.

  In the hearing aid apparatus according to the present invention, the second wearing part is detachably connected to the main body part via the second wiring. Therefore, the user can connect the second mounting part to the main body part when he wants to hear the surrounding sounds in detail, and can detach the second mounting part from the main body part when using the hearing aid device easily.

It is a figure which shows the hearing aid apparatus which concerns on embodiment of this invention, (A) is a figure which shows the whole apparatus, (B) is sectional drawing which shows the structure of a 1st mounting part. It is a figure which shows the state which a user wears the hearing aid apparatus which concerns on embodiment of this invention, (A) is the figure which looked at the user from upper direction, (B) has mounted | worn the mounting part to the ear | edge. It is sectional drawing which shows the state which exists. It is a figure which shows the main-body part of the hearing aid apparatus which concerns on embodiment of this invention. It is a circuit diagram which shows the amplifier circuit integrated in the hearing aid apparatus which concerns on embodiment of this invention. 5 is a graph showing a relationship between sound pressure input and current consumption in a hearing aid apparatus according to an embodiment of the present invention.

  Hereinafter, a hearing aid apparatus 10 according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the directions of up, down, front, back, left and right are used as appropriate.

  With reference to FIG. 1, schematic structure of the hearing aid apparatus 10 of this form is demonstrated. FIG. 1A is a diagram illustrating the whole of the hearing assistance device 10, and FIG. 1B is a cross-sectional view illustrating the internal configuration of the first mounting portion 11.

  Referring to FIG. 1A, a hearing aid device 10 includes a main body part 13, a first mounting part 11 connected to the main body part 13 via a first wiring 14, and the main body part 13 and a second wiring. And a second mounting portion 12 connected via 15.

  The function of the hearing aid device 10 is to convert external sound audible from the outside into an electric signal by the microphone unit built in the first mounting unit 11 and the second mounting unit 12, and this electric signal is amplified in the main body unit 13. The amplification is performed by a circuit, and the amplified electrical signal is converted into an audio signal by a speaker unit built in the first mounting unit 11 and the second mounting unit 12. By doing in this way, the user 29 (FIG. 2 (A)) who wears the first wearing part 11 and the second wearing part 12 in each ear can easily hear external sounds and can smoothly talk with others. It is possible to improve the quality of life and avoid danger by listening to life sounds accurately. The hearing aid apparatus 10 having such a configuration may be referred to as a hearing aid or a sound collector. The hearing aid device 10 is a so-called ear hook type. Furthermore, the hearing aid apparatus 10 according to the present embodiment may be referred to as a sound collector.

  The 1st mounting part 11 is a site | part which the user 29 who uses the hearing aid apparatus 10 mounts to the ear | edge, and is exhibiting the substantially cylindrical shape which can be inserted in an ear hole partly. As shown in FIG. 1B, the first wearing unit 11 converts the external sound reflected by the auricle 33, which will be described later, into an electrical signal, and converts the amplified electrical signal into an audio signal. The first speaker unit 21 is built in. Similarly, the second mounting portion 12 includes a microphone portion and a speaker portion (not shown).

  The main body 13 amplifies the electrical signals input from the first mounting unit 11 and the second mounting unit 12, and outputs the amplified electrical signals to the first mounting unit 11 and the second mounting unit 12. As will be described later, the casing 25 forming the outer shape of the main body portion 13 is made of an injection-molded synthetic resin, and exhibits a curved shape that can be intimately contacted from the rear side at the boundary between the user's 29 ear and the head side surface. Yes.

  Further, the upper end portion side of the main body 13 and the first mounting portion 11 are connected via the first wiring 14. One end side of the first wiring 14 is fixed by soldering to a mounting board (not shown) inside the main body portion 13, and the other end side of the first wiring 14 is fixed to the first mounting portion 11. Yes. That is, the main body portion 13 and the first mounting portion 11 are connected via the first wiring 14 fixed to both, and the first mounting portion 11 is detached from the main body portion 13 under use conditions. Is not expected.

  On the other hand, the plug 16 disposed on one end side of the second wiring 15 is inserted into a socket 17 disposed on the lower end of the main body portion 13. The structure for inserting the plug 16 into the socket 17 may be the same as a so-called earphone jack. The other end side of the second wiring 15 is fixed to the second mounting portion 12. With this configuration, the second mounting portion 12 can be detachably connected to the main body portion 13, and the user 29 uses only the first mounting portion 11 and the second mounting portion 12 or the first mounting portion 11 depending on the situation. Can do.

  The first wiring 14 that connects the first mounting portion 11 and the main body portion 13 is shorter than the second wiring 15 that connects the second mounting portion 12 and the main body portion 13. Therefore, as will be described later, the main body 13 can be hung on the right ear 32, the first attachment portion 11 can be attached to the ear hole of the right ear 32, and the second attachment portion 12 can be attached to the ear hole of the left ear 31.

  With reference to FIG. 1 (B), in the 1st mounting part 11, the 1st microphone part 20 and the 1st speaker part 21 are arrange | positioned inside the casing 18 which exhibits a substantially cylindrical shape, for example. The first microphone unit 20 is disposed on the outside as viewed from the user 29, and the first speaker unit 21 is disposed on the inside. In addition, an ear piece 22 is disposed at an inner end portion of the casing 18, and the ear piece 22 is inserted into an ear hole of the user 29 under use conditions.

  With reference to FIG. 2, a method in which the user 29 wears the hearing aid apparatus 10 having the above-described schematic configuration will be described. 2A shows a state in which a user 29 who is, for example, a deaf person wears the hearing aid 10, and FIG. 2B shows a cross section showing the right ear 32 wearing the first wearing part 11. FIG.

  With reference to FIG. 2 (A), the user 29 here has hung the main-body part 13 on the base part of the head 30 and the right ear 32 from back. In addition, the user 29 wears the first attachment part 11 in the ear hole of the right ear 32 and wears the second attachment part 12 in the ear hole of the left ear 31. The main body portion 13 and the first mounting portion 11 are connected via a first wiring 14 that passes through the upper side of the right ear 32, and the main body portion 13 and the second mounting portion 12 are connected to the rear side of the head 30. The second wiring 15 is connected via the second wiring 15.

  With reference to FIG. 2 (B), the structure by which the 1st mounting part 11 is mounted | worn with the right ear 32 is demonstrated. Here, the first mounting portion 11 is fixed to the right ear 32 by inserting the earpiece 22 of the first mounting portion 11 into the external ear canal 34 on the right ear 32 side. Further, in this mounted state, the first microphone unit 20 of the first mounting unit 11 is disposed outside, and the first speaker unit 21 is disposed inside. The first microphone unit 20 is disposed on the inner side of the outer end portion of the auricle 33. The electrical signal generated by the first microphone unit 20 is amplified by the main body unit 13 to be an amplified electrical signal, and then converted to an audio signal by the first speaker unit 21. By doing in this way, the external sound reflected by the pinna 33 can be collected well by the first microphone unit 20, and the high-quality sound collected by the pinna 33 is converted into an electric signal by the first microphone unit 20. The amplified signal based on this electrical signal is converted into an audio signal by the first speaker unit 21, and the user 29 can hear the high-quality audio signal with the right ear 32.

  Although not shown here, the second mounting portion 12 described above also has the same configuration as the first mounting portion 11 and is inserted and fixed in the ear hole of the left ear 31 similarly to the first mounting portion 11. Then, the reflected sound reflected by the outer ear of the left ear 31 is converted into an electric signal by the microphone unit built in the second mounting unit 12, and further converted into an amplified electric signal by the main body unit 13, and is transmitted to the second mounting unit 12. An audio signal is emitted from the built-in microphone.

  In this manner, in each of the right ear 32 and the left ear 31, the reflected sound reflected by the pinna 33 is converted into an electric signal by the microphone unit, and the amplified electric signal obtained by amplifying the electric signal is converted into an audio signal by the speaker unit. Thus, the user 29 can hear the external sound with high quality. That is, an audio signal faithfully reproducing the external sound reflected by the outer ear of the right ear 32 can be heard from the eardrum of the right ear 32 via the first wearing unit 11. Similarly, an audio signal that faithfully reproduces the external sound reflected by the outer ear of the left ear 31 can be heard on the eardrum of the left ear 31 via the second attachment unit 12. Therefore, the user 29 can accurately know the direction of the sound source and the distance to the sound source, can detect the danger in daily life through hearing, and can avoid the danger.

  Further, as shown in FIG. 2B, in this embodiment, the first microphone unit 20 is disposed on the outer end surface of the first mounting unit 11. By doing in this way, the pinna effect which captures the reflected sound of the pinna 33 can be enlarged, a clearer voice can be converted with the 1st microphone part 20, and sound collection with high directivity can be performed. it can.

  Further, as shown in FIG. 2A, the second wiring 15 extends from the body portion 13 hung on the right ear 32 to the second attachment portion 12 attached to the left ear 31 on the rear side of the head 30. Therefore, the second wiring 15 does not interfere with the activity of the user 29.

  Furthermore, in the hearing aid device 10 of the present embodiment, the second wiring 15 that connects the second mounting part 12 and the main body part 13 is detachable from the main body part 13, so that both ears or one ear is used depending on the situation. Hearing aids can be used. Specifically, when the user 29 hears the external sound in detail, the plug 16 of the second wiring 15 is inserted into the socket 17 of the main body 13, and the main body 13 is placed behind the right ear 32. The first mounting part 11 is inserted into the ear hole of the right ear 32, and the second mounting part 12 is inserted into the ear hole of the left ear 31. On the other hand, when the user 29 simply uses the hearing aid device 10, the plug 16 of the second wiring 15 is pulled out from the socket 17 of the main body 13, the main body 13 is hung on the right ear 32, and the first mounting portion 11 is used as a general one-ear hearing aid.

  Furthermore, as will be described later, the hearing aid apparatus 10 of the present embodiment has an amplifier circuit that amplifies an electrical signal supplied to the first mounting unit 11 and the second mounting unit 12 on the main body unit 13 that is to be hooked on one ear. Aggregated. Therefore, although the appearance of the hearing aid device 10 has a shape of one of the ear hooks, in practice, sound collection and amplification can be individually performed by the left and right ears.

  With reference to FIG. 3, the structure of the main-body part 13 is demonstrated. The main body 13 includes a casing 25 made of a synthetic resin (for example, ABS resin) having a curved shape that can be put on the ear of the user 29, and a mounting board (not shown) is provided inside the casing 25. Built in. A conductive pattern is formed on the mounting board (not shown), and a predetermined electrical circuit is realized by connecting circuit elements such as transistors fixed to the mounting board in the reflow process with the conductive pattern. Here, in order to increase durability, a silicone resin resistant to sweat may be used for the ear hooking portion of the casing 25.

  Connected to the upper end side of the casing 25 is a first wiring 14 connected to the first mounting portion 11 (not shown). The end of the first wiring 14 on the main body 13 side is fixed to a mounting board built in the casing 25.

  A socket 17 as a connecting portion is built in the lower end side of the casing 25, and this socket 17 is fixed to the mounting board. As described above, by inserting the plug 16 into the socket 17, the electrical circuit built in the main body 13 and the second wiring 15 can be electrically connected.

  From the rear side surface of the casing 25, a dial-type volume adjusting unit 26 partially protrudes rearward. The volume adjusting unit 26 is formed in two lines corresponding to the first mounting unit 11 and the second mounting unit 12, and adjusts the amplification degree of the electric signal by rotating each volume adjusting unit 26, The magnitudes of audio signals emitted from the first mounting unit 11 and the second mounting unit 12 can be adjusted. Therefore, the user 29 can easily adjust the volume according to the external environment by rotating and adjusting the volume adjusting unit 26.

  Here, on the rear surface of the casing 25, an operation unit may be provided in addition to the volume adjustment unit 26. For example, the casing 25 includes a power switch for operating an on / off operation of the main function of the main body 13, a balance adjusting unit for adjusting the balance of the magnitudes of audio signals emitted from the first mounting unit 11 and the second mounting unit 12, and the like. It may be formed on the rear side.

  Here, a hook 27 is formed on the upper end of the main body 13 described above. The first wiring 14 passes through the inside of the hook 27. The left end of the hook 27 on the paper surface is fixed to the main body 13, and the right end of the hook 27 is a free end. The hook 27 is made of a soft synthetic resin such as silicon resin. Inside the hook 27, a metal wire such as a copper wire whose end is fixed to the main body 13 may be incorporated. By doing in this way, the hook 27 can be deform | transformed according to a user's ear shape, and the discomfort when a user wears the hearing aid apparatus 10 can be reduced.

  Furthermore, when the hearing aid apparatus 10 is viewed from the rear, the width of the hook 27 in the left-right direction is shorter than the width of the main body 13 in the left-right direction. In this way, the hook 27 becomes sufficiently thin in the left-right direction, and the user can hang the hook 27 from behind on the ear while wearing the glasses. Can be improved.

  With reference to FIG. 4, a circuit incorporated in the hearing aid device 10 of the present embodiment will be described. First, the first amplifier circuit 48 that amplifies the electric signal supplied from the first mounting portion 11 will be described. The first microphone unit 20 of the first wearing unit 11 converts the external sound reflected from the pinna 33 into a first electric signal. A preamplifier 38 and an ALC 39 are connected in parallel to the first microphone unit 20, and thereby excessive audio signals and howling included in the first electric signal are automatically suppressed to an appropriate level. Here, ALC is an abbreviation for Automatic Level Control. A volume 42 is connected between the preamplifier 38 and the ALC 39 and the power amplifier 44, and the current value of the first electric signal is changed by adjusting the resistance value of the volume 42 which is a variable resistor. . The power amplifier 44 amplifies the first electric signal with a predetermined amplification factor to generate a first amplified electric signal. The first amplified electrical signal is sent to the first mounting unit 11 and converted into a first audio signal by the first speaker unit 21. That is, the first speaker unit 21 reproduces output sound based on the first amplified electric signal.

  The configuration of the second amplifier circuit 49 that amplifies the electric signal supplied from the second mounting portion 12 is the same as that of the first amplifier circuit 48 described above. That is, the preamplifier 36, the ALC 37, the volume 41, and the power amplifier 43 are connected from the second microphone part 23 side of the second mounting part 12. With this configuration, the second electric signal converted from the external sound by the second microphone unit 23 of the second mounting unit 12 is suppressed to an appropriate level by the preamplifier 36 and the ALC 37, and then is set to a predetermined current value by the volume 41. After being converted into the second amplified electric signal by the power amplifier 43, it is converted into a second audio signal by the second speaker unit 24 of the second mounting unit 12.

  A balance resistor 40 is disposed between the first amplifier circuit 48 and the second amplifier circuit 49. By adjusting the resistance value of the balance resistor 40, the first audio signal and the second amplifier signal are adjusted. The ratio of the size to the two audio signals can be changed. Further, a current is supplied from the power supply 45 to the amplifier circuit described above via the switch 46.

  The plug 16 and the socket 17 arranged between the second mounting portion 12 and the second amplifier circuit 49 function as a switch. Therefore, by pulling out the plug 16 from the socket 17 and using the hearing aid device 10 with only the first mounting portion 11, the life of the battery used as the power supply 45 can be extended. In this case, the first amplifier circuit 48 shown in FIG. 4 generates an amplified electric signal, but the second amplifier circuit 49 does not generate an amplified electric signal. Further, by pulling out the plug 16 from the socket 17, a circuit for supplying an electrical signal from the second microphone portion 23 of the second mounting portion 12 to the main body portion 13 is cut off, and the main body portion 13 is connected to the second mounting portion 12. The circuit that supplies the amplified electrical signal to the second speaker unit 24 is also shut off.

  This matter will be described with reference to the graphs of FIGS. 4 and 5 described above. In the graph of FIG. 5, the horizontal axis indicates the sound pressure input value in each speaker unit, and the vertical axis indicates the current value consumed.

  Referring to the graph of FIG. 5, when the plug 16 is connected to the socket 17 and the second mounting portion 12 is connected to the second amplifier circuit 49, the current consumption increases as the input sound pressure level increases. Specifically, the current consumption increases remarkably in proportion to the sound pressure level at a sound pressure level of 90 dB or more, and the current consumption increases when used with a large sound input / output, resulting in a long battery life. Shorter.

  On the other hand, when the plug 16 is pulled out from the socket 17, the current consumption of the second amplifying circuit 49 on the removed side is only the bias current, and the overall current consumption is suppressed, so that the battery life can be extended. Referring to FIG. 5, since the bias current without sound pressure input is 1.4 mA, a 300 mAh air battery has a battery life of 214 hours.

  If the input sound pressure is a little larger and 100 dBSPL, the current consumption increases to about 2.5 mA, resulting in a battery life of about 120 hours. On the other hand, when the plug 16 is pulled out from the socket 17, the increase in current is about half and the current consumption is 1.95 mA, so the battery life can be increased to 154 hours.

  From the above, in the hearing aid device 10 of the present embodiment, the plug 16 is pulled out from the socket 17 and used only by the first mounting portion 11, thereby extending the battery life and reducing the troublesomeness of battery replacement. Cost efficiency can be improved.

  As mentioned above, although embodiment of this invention was shown, this invention is not limited to the said embodiment.

  For example, referring to FIG. 3, the second wiring 15 is detachably connected to the main body 13, but the second wiring 15 may be fixed to the main body 13. Even in such a case, the user can hear the external sound satisfactorily using the first mounting portion 11 and the second mounting portion 12.

DESCRIPTION OF SYMBOLS 10 Hearing assistance apparatus 11 1st mounting part 12 2nd mounting part 13 Main body part 14 1st wiring 15 2nd wiring 16 Plug 17 Socket 18 Casing 20 1st microphone part 21 1st speaker part 22 Earpiece 23 2nd microphone part 24 1st 2 Speaker unit 25 Casing 26 Volume adjustment unit 27 Hook 29 User 30 Head 31 Left ear 32 Right ear 33 Auricle 34 External auditory canal 36 Preamplifier 37 ALC
38 Preamplifier 39 ALC
40 Balance resistor 41 Volume 42 Volume 43 Power amplifier 44 Power amplifier 45 Power supply 46 Switch 48 First amplifier circuit 49 Second amplifier circuit

Claims (5)

A first microphone for converting external sound heard from one side into a first electric signal, and a first speaker for converting a first amplified electric signal generated by amplifying the first electric signal into a first audio signal A first mounting portion that is attached to one ear of the user,
A second microphone for converting external sound heard from the other side into a second electric signal; and a second speaker for converting the second amplified electric signal generated by amplifying the second electric signal into a second audio signal. A second mounting portion that is attached to the ear of the other side of the user,
A first amplifier circuit for amplifying the first electric signal into the first amplified electric signal; a second amplifier circuit for amplifying the second electric signal into the second amplified electric signal; the first amplifier circuit; A power source unit that supplies current to the two amplifier circuits, and a main body unit,
The main body portion has a size and a shape that can be hung on one ear of a user, the first mounting portion is connected to the main body portion via a first wiring, and the second mounting portion is a second one. A hearing assist device connected to the main body through a wiring.   The hearing aid apparatus according to claim 1, further comprising a volume adjustment unit that adjusts an amplification degree of the first audio signal or the second audio signal at a rear portion of the main body.   3. The hearing aid according to claim 1, wherein the second amplifier circuit does not generate the second amplified electric signal when the second wiring is not connected to the main body. 4. . A connection portion with the first wiring is disposed on the upper end side of the main body portion,
The hearing assist device according to any one of claims 1 to 3, wherein a connection portion with the second wiring is detachably disposed on a lower end side of the main body portion. The hearing aid apparatus according to any one of claims 1 to 4, wherein the second wearing part is detachably connected to the main body part via the second wiring.

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