Multi-channel hearing aids

Abstract

The present invention discloses a multi-channel hearing aid device, comprising earphones and a host, the earphones are connected to the host, the host comprises a sound input module, a controller, a DSP chip and a sound output module, the DSP chip comprises a left channel DSP and a right channel DSP, the sound output module comprises a left channel output module and a right channel output module, the sound input module comprises a microphone array input module, the microphone array input module is respectively connected to the left channel DSP and the right channel DSP, the left channel DSP is connected to the left channel output module, the right channel DSP is connected to the right channel output module, and the left channel output module and the right channel output module are both connected to the earphones. The multi-channel hearing aid device of the present invention effectively utilizes the advantage of the large internal space of the box-type hearing aid, makes up for the shortcomings of various hearing aids in terms of sound collection and DSP system, effectively simulates the form of sound collection by the left and right ears of the human body, and greatly improves the listening effect in a noisy environment.

Description

Technical Field

[0001] The present invention relates to the field of hearing aids, and in particular to a multi-channel hearing aid device. Background Art

[0002] Usually, hearing aids only have one microphone system, which is responsible for collecting sound; and one speaker system, which is responsible for outputting the sound amplified by the hearing aid DSP circuit for the deaf user to compensate for hearing and listen. This design is very convenient to use, but the hearing aid effect is not good. In addition to the poor sound processing effect caused by the hearing aid circuit design problem, another important reason is single-ear hearing aid. Most deafness cases are bilateral hearing loss, and the hearing effect of both ears is better than that of one ear, even for people with normal hearing. Due to the defects of single-ear hearing aid of box-type hearing aids, this economical and applicable hearing aid method is being replaced by expensive ear-hook or ear canal hearing aids, and these expensive hearing aids do not bring more satisfaction and better effects to deaf patients, which leads to the unwillingness to choose rehabilitation due to the high price limit - "cannot afford it". This state of not very good effect and too high price has led to the situation that 80% of the elderly are unwilling to use hearing aids.

[0003] At present, the domestic hearing aid market is dominated by imported hearing aids. There are two popular hearing aid styles: one is the behind-the-ear hearing aid, which is hung behind the auricle; the other is the ear canal hearing aid, which is inserted into the external ear canal, similar to the commonly used in-ear headphones. These two types of hearing aids are made smaller and smaller, because people with hearing loss are not willing to let others know their hearing defects. In order to pursue beauty, manufacturers blindly reduce the size of hearing aids. The most difficult problem to avoid with small hearing aids is that the number and position of microphones are limited. Therefore, modern hearing aids often do not work well in noisy environments. At present, many manufacturers have also tried to improve the listening effect by developing new DSP systems, but the problem has not only failed to make a significant breakthrough, but also caused the high price of hearing aids, which made a large part of the hearing-impaired people unable to afford it, and finally chose to give up wearing hearing aids. If you choose a low-priced behind-the-ear or ear canal hearing aid, the listening effect will be very poor, which is even more difficult for users to accept. Summary of the invention

[0004] The present invention provides a multi-channel hearing aid device, which can effectively utilize the advantage of the large internal space of the box-type hearing aid, make up for the shortcomings of various hearing aids in terms of sound collection and DSP system, set left and right channels in the box-type hearing aid, and set a matrix microphone system in each channel, independently collect sound and independently transmit it to the built-in processing DSP chip, and output it independently from the left and right channels, effectively simulating the form of sound collection by the left and right ears of the human body, greatly improving the listening effect in a noisy environment. At the same time, such a hearing aid has a low cost. It is estimated that the product of the present invention can help people in need save 90% of their expenses, and is expected to replace imported hearing aid products, allowing people in need to use more economical products to solve hearing and hearing protection problems, and at least solve one of the above problems.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, a multi-channel hearing aid device is provided, comprising headphones and a host, the headphones are connected to the host, the host comprises a sound input module, a controller, a DSP chip and a sound output module, the DSP chip comprises a left channel DSP and a right channel DSP, the sound output module comprises a left channel output module and a right channel output module, the sound input module comprises a microphone array input module, the microphone array input module is respectively connected to the left channel DSP and the right channel DSP, the left channel DSP is connected to the left channel output module, the channel DSP is connected to the right channel output module, and the left channel output module and the right channel output module are both connected to the headphones.

[0006] Therefore, the multi-channel hearing aid device of the present invention effectively utilizes the advantage of the large internal space of the box-type hearing aid, makes up for the shortcomings of various hearing aids in sound collection and DSP system, sets left and right channels in the DSP chip, and uses the microphone array input module to independently collect sound, and then independently transmits it to the left and right channel DSP for processing, and finally outputs it independently by the left channel output module and the right channel output module. The multi-channel hearing aid device of the present invention effectively simulates the form of sound collection by the left and right ears of the human body, greatly improving the listening effect in a noisy environment. At the same time, such a hearing aid has a low cost. It is estimated that the product of the present invention can help people in need save 90% of their expenses, and is expected to replace imported hearing aid products, allowing people in need to use more economical products to solve hearing and hearing protection problems.

[0007] In some embodiments, the microphone array input module includes a housing and a microphone array assembly installed in the housing, the microphone array assembly is installed in the housing, the microphone array assembly includes at least two microphones, and a sound inlet corresponding to the microphone is provided on the housing, and the sound inlet is connected to the microphone. Thus, the microphone array assembly collects external sound signals through the sound inlet on the housing and converts them into electrical signals; the DSP chip is used to process the signals transmitted by the microphone array assembly; the controller is used to control the DSP chip to perform microphone directional switching or mode conversion, etc. Since the device is provided with multiple microphone array assemblies, it can collect and process external sounds in detail very well, and the processed sound signals are transmitted into the ears through the speakers in the headphones to achieve a better and more realistic listening effect. Even when used in complex scenarios, users can clearly and clearly hear speech sounds from all directions, and have a good stereo effect.

[0008] In some embodiments, the microphone array input module also includes a connector and an adapter, the housing is connected to the connector, the signal line of each microphone is connected to the connector, the adapter is provided with a mounting slot, the connector matches the mounting slot, and the connector is connected to the DSP chip through the adapter. Thus, the signal line of each microphone is welded to the connector, the connector is equivalent to a "plug", when in use, the connector is inserted into the mounting slot of the corresponding adapter (equivalent to a "socket"), and the connector is connected to the DSP chip through the adapter. When in use, the housing can be manually rotated to make the sound inlet face the desired sound source direction; a driving member can also be set to drive the adapter to drive the entire device to rotate and realize electric adjustment. The device can enable the microphone array assembly to efficiently identify and collect effective sound sources in the surrounding environment in a manual or electric form. When the microphone array input module is used in conjunction with a box-type hearing aid, the body can be used to shield or block the sound behind the body and the microphone can be adjusted to point to the front of the body, so that the user can improve the communication with the face-to-face person and reduce the interference of the sound behind the body. However, ear-hanging hearing aids or ear canal hearing aids cannot use the body as a sound barrier, nor can they adjust the direction of the microphone. Therefore, in noisy environments or crowded environments, the hearing aid effect is not good, which has always been the shortcoming of expensive hearing aids. The hearing aid device of the present invention utilizes the above-mentioned microphone array input module, which not only solves the shortcomings of current hearing aids, but also, because the box-type hearing aid is low in price (only one-tenth of the price of existing hearing aids), easy to use, and has a fashionable appearance design, it can be matched with fashionable earphone products and can be popularized, thereby increasing the popularity of hearing protection and rehabilitation and reducing the incidence of hearing loss and hearing disability.

[0009] In some embodiments, the microphone array input module further includes a turntable and a driving member, wherein the turntable is fixedly mounted at the bottom of the adapter, and the driving member is connected to the turntable by power to drive the turntable to rotate. Thus, the adapter of the present invention can be connected to a driving member such as a micro motor, and the rotation of the motor drives the rotation of the adapter, and finally drives the rotation of the housing, thereby realizing the electric adjustment of the microphone direction.

[0010] In some embodiments, the microphone array input module further includes a fastener, one end of which is fixedly mounted on the inner wall of the mounting slot, and the other end of which is matched with the outer wall of the connector. Thus, in order to ensure that the connector and the adapter can be in stable contact during multiple rotations, the inner wall of the mounting slot is provided with a fastener, and the fastening effect of the fastener can keep the two in stable contact.

[0011] In some embodiments, there are multiple fasteners, and the fasteners are metal springs. Thus, the fasteners are U-shaped or V-shaped metal springs and there are multiple of them, which have good fastening effect and can be retracted.

[0012] In some embodiments, there are multiple sound inlet holes, and the multiple sound inlet holes are distributed in an array around the center of the shell. The microphone array assembly includes multiple microphones and multiple simulated ear canals. The number of microphones and the simulated ear canals is the same as the number of sound inlet holes. The microphone is connected to the DSP chip, and one end of the simulated ear canal is connected to the sound inlet hole, and the other end is connected to the microphone. Thus, the arrangement of multiple sound inlet holes, multiple microphones, and multiple simulated ear canals is conducive to the collection and comparison of sounds from all directions by the sound collection device, which is conducive to speech enhancement and noise reduction. The purpose of setting the simulated ear canal is to imitate the physiological structure of the external auditory canal of the real ear of the human body as much as possible, so as to better obtain detailed information. At the same time, since the simulated ear canal is arranged at the front end of the microphone, the external sound will first pass through this section of the simulated ear canal after being transmitted from the sound inlet hole, and then reach the microphone. In this way, the sound signal finally heard by the hearing-impaired person wearing a hearing aid will be the same as that directly transmitted from the real ear, with more complete detailed information.

[0013] In some embodiments, the simulated ear canal is curved and the width of the simulated ear canal gradually narrows from the sound inlet to the inside, thereby facilitating the collection and amplification of sound signals.

[0014] In some embodiments, the host further comprises a housing, in which the sound input module, the controller, the DSP chip and the sound output module are all installed, and the housing is coated on the outer periphery of the adapter. Thus, the housing of the present invention can completely cover all components, leaving only the outer shell of the microphone array input module exposed. The housing shape of the host can be similar to that of an MP3, which is beautiful and generous.

[0015] In some embodiments, the sound input module may also include one or more of a Bluetooth input module, an audio storage input module, or a USB sound card input module. Thus, different ways of sound input may be selected according to actual needs, which has a wide range of applications and strong practicality.

[0016] In some embodiments, the left channel output module includes a left channel filter and a left channel amplifier, the left channel filter is connected to the left channel DSP, the left channel amplifier is connected to the left channel filter, the right channel output module includes a right channel filter and a right channel amplifier, the right channel filter is connected to the right channel DSP, the right channel amplifier is connected to the right channel filter, and the left channel amplifier and the right channel amplifier are both connected to the earphone. Thus, the filter is used to filter and select the sound signal processed by the DSP chip, and the amplifier is used to amplify the sound signal.

[0017] In some embodiments, the sound output module further includes a Bluetooth transmitting module, the left channel amplifier and the right channel amplifier are both connected to the Bluetooth transmitting module, and the headset is provided with a Bluetooth receiving module, which is communicatively connected to the Bluetooth transmitting module. Thus, the Bluetooth transmitting module is used to connect to the Bluetooth receiving modules on one side or both sides of the headset via Bluetooth. The host and the headset of the present invention are connected via Bluetooth, and can be used separately and in combination, which is convenient to operate.

[0018] Beneficial effects of the present invention:

[0019] The multi-channel hearing aid device of the present invention effectively utilizes the advantage of the large internal space of the box-type hearing aid, and makes up for the shortcomings of various hearing aids in terms of sound collection and DSP system. The left and right channels are set in the DSP chip, and the microphone array input module is used to independently collect the sound, and then independently transmit it to the left and right channel DSPs for processing, and finally output independently by the left channel output module and the right channel output module. The multi-channel hearing aid device of the present invention effectively simulates the form of sound collection by the left and right ears of the human body, greatly improving the listening effect in a noisy environment. At the same time, such a hearing aid has a low cost. It is estimated that the product of the present invention can help people in need save 90% of their expenses, and is expected to replace imported hearing aid products, allowing people in need to use more economical products to solve hearing and hearing protection problems.

[0020] The device can enable the microphone array assembly to efficiently identify and collect effective sound sources in the surrounding environment in a manual or electric manner. When the microphone array input module is used in conjunction with a box-type hearing aid, the body can be used to shield or block the sound behind the body and the microphone can be adjusted to point to the front of the body, so that the user's communication with the face-to-face person can be improved and the interference of the sound behind the body can be reduced. However, the ear-hanging hearing aid or the ear canal hearing aid cannot use the body as a sound barrier, nor can the microphone be adjusted to point, so in a noisy environment or a crowded environment, the hearing aid effect is not good, which has always been the shortcoming of expensive hearing aids. The hearing aid device of the present invention utilizes the above-mentioned microphone array input module, which not only solves the shortcomings of the current hearing aids, but also, because the box-type hearing aid is low in price (only one-tenth of the price of the existing hearing aid), easy to use, and fashionable in appearance design, it can be matched with fashionable headphone products and can be popularized, thereby increasing the popularity of hearing protection and rehabilitation and reducing the incidence of hearing loss and hearing disability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a microphone array input module of a multi-channel hearing aid device according to Example 1;

[0022] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the housing of the microphone array input module shown;

[0023] Figure 3 This is a schematic diagram of the control circuit structure of the multi-channel hearing aid device of Example 1;

[0024] Figure 4 Schematic diagram of the control circuit structure of the multi-channel hearing aid device of Example 2.

[0025] Figures 1 to 4 Figure numerals: 1-headphone; 2-host; 11-Bluetooth receiving module; 22-sound input module; 22A-microphone array input module; 22B-Bluetooth input module; 22C-audio storage input module; 22D-USB sound card input module; 23-controller; 24-DSP chip; 24A-left channel DSP; 24B-right channel DSP; 25-sound output module; 25A-left channel output module; 25B-right channel output module; 25C-Bluetooth transmitting module ;26-power supply module;27-button module;28-indicator light module;221-housing;222-microphone array assembly;223-connector;224-adapter;225-turntable;226-driving member;227-fastener;251-left channel filter;252-left channel amplifier;253-right channel filter;254-right channel amplifier;221a-sound inlet;222a-microphone;222b-simulated ear canal;224a-installation slot;224b-connector. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] Example 1

[0028] Figures 1 to 3 The multi-channel hearing aid device of Example 1 is schematically shown.

[0029] like Figures 1 to 3 As shown, the multi-channel hearing aid device includes an earphone 1 and a host 2, and the earphone 1 is connected to the host 2. The host 2 includes a sound input module 22, a controller 23, a DSP chip 24 and a sound output module 25. The DSP chip 24 includes a left channel DSP 24A and a right channel DSP 24B. The sound output module 25 includes a left channel output module 25A and a right channel output module 25B. The sound input module 22 includes a microphone array input module 22A. The microphone array input module 22A is respectively connected to the left channel DSP 24A and the right channel DSP 24B, the left channel DSP 24A is connected to the left channel output module 25A, the channel DSP is connected to the right channel output module 25B, and the left channel output module 25A and the right channel output module 25B are both connected to the earphone 1.

[0030] The microphone array input module 22A includes a housing 221 and a microphone array assembly 222 installed in the housing 221. The microphone array assembly 222 is installed in the housing 221, and the microphone array assembly 222 includes at least two microphones 222a. The housing 221 is provided with a sound inlet 221a corresponding to the microphone 222a, and the sound inlet 221a is connected to the microphone 222a. Thus, the microphone array assembly 222 collects external sound signals through the sound inlet 221a on the housing 221 and converts them into electrical signals; the DSP chip 24 is used to process the signals transmitted by the microphone array assembly 222; the controller 23 is used to control the DSP chip 24 to switch the directionality or mode of the microphone 222a. Since the device is provided with multiple microphone array assemblies 222, it can collect and process the details of external sounds very well, and the processed sound signals are transmitted into the ear through the speaker in the earphone 1, so as to achieve a better and more realistic listening effect. Even when used in complex scenes, the user can clearly and clearly hear the speech sounds from all directions, and has a good stereo effect.

[0031] The microphone array input module 22A also includes a connector 223 and an adapter 224. The housing 221 is connected to the connector 223, and the signal lines of each microphone 222a are welded to the connector 223. The adapter 224 is provided with a mounting groove 224a, and the connector 223 matches the mounting groove 224a. The connector 223 is connected to the DSP chip 24 through the adapter 224. The upper end of the connector 223 of this embodiment can be connected to the housing 221 by means of set, bonding or welding to form an integral structure, and the lower end of the connector 223 matches the mounting groove 224a of the adapter 224, and can be detachably connected, such as the lower end of the connector 223 is truncated cone-shaped, and the mounting groove 224a is a truncated cone groove matching therewith, and the connector 223 can be inserted into the mounting groove 224a to achieve the connection between the connector 223 and the adapter 224.

[0032] Thus, the signal lines of each microphone 222a are welded to the connector 223, which is equivalent to a "plug". When in use, the connector 223 is inserted into the mounting slot 224a of the corresponding adapter 224 (equivalent to a "socket"). The adapter 224 communicates or is electrically connected with other signal processing systems (such as DSP chip 24), power supplies, etc. When in use, the housing 221 can be manually rotated to make the sound inlet 221a face the desired sound source direction; a driving member 226 can also be set to drive the adapter 224 to drive the entire device to rotate and realize electric adjustment. This device can enable the microphone array assembly 222 to efficiently identify and collect effective sound sources in the surrounding environment in a manual or electric manner. The device is small and concealed and can be installed in a variety of hearing aids, sound systems, speech systems and other equipment that need to pick up sound sources.

[0033] The microphone array input module 22A of this embodiment further includes a fastener 227. One end of the fastener 227 is fixedly mounted on the inner wall of the mounting groove 224a by screws or bonding, and the other end is matched with the outer wall of the connector 223. Therefore, in order to ensure that the connector 223 and the adapter 224 can be in stable contact during multiple rotations, the inner wall of the mounting groove 224a is provided with a fastener 227, and the fastening effect of the fastener 227 can keep the two in stable contact.

[0034] The fasteners 227 of this embodiment are multiple, and the fasteners 227 are metal springs. Therefore, the fasteners 227 are U-shaped or V-shaped metal springs and are multiple, with good fastening effect and can be retracted.

[0035] like Figure 2As shown, there are multiple sound inlet holes 221a, and the multiple sound inlet holes 221a are distributed in an array around the center of the housing 221. The microphone array assembly 222 includes multiple microphones 222a and multiple simulated ear canals 222b. The number of microphones 222a and simulated ear canals 222b is the same as the number of sound inlet holes 221a. The number of sound inlet holes 221a, microphones 222a and simulated ear canals 222b can be set to 2, 4, 8 or even more as needed. Figure 2 As shown, the number of sound inlet holes 221a, microphones 222a and simulated ear canals 222b in this embodiment are all 4. The signal line of each microphone 222a is welded to the connector 223, and one end of the simulated ear canal 222b is connected to the sound inlet hole 221a, and the other end is connected to the microphone 222a. The edges of the microphone 222a and the simulated ear canal 222b are glued and fixed, with no gap in the middle. The provision of multiple sound inlet holes 221a, multiple microphones 222a and multiple simulated ear canals 222b is conducive to the sound collection device to collect and compare sounds from all directions, and is conducive to speech enhancement and noise reduction.

[0036] In this embodiment, the outer shape of the housing 221, the connector 223 and the adapter 224 may be cylindrical, and the housing 21 of the host 2 may be a rectangular parallelepiped.

[0037] like Figure 2 As shown, the simulated ear canal 222b of this embodiment is curved and the width of the simulated ear canal 222b gradually narrows from the sound inlet 221a inward. Thus, the simulated ear canal 222b adopts a funnel-shaped and slightly curved structure with a wide front and a narrow back, the purpose of which is to imitate the physiological structure of the external ear canal of the real ear as much as possible, which is conducive to the collection and amplification of sound signals. The simulated ear canal 222b simulates the external ear canal structure of the human ear, and its length is 23 mm (the external ear canal of a normal human ear is about 21-25 mm long). Multiple simulated ear canals 222b are all tilted and arranged in an array around the center of the shell 221. Thus, the simulated ear canal 222b is tilted and arranged in an array around the center of the shell 221, which is a space-saving design. The simulated ear canal 222b of this embodiment can be made of elastic plastic materials such as silica gel. The specific implementation method can be: the shell 221 is made of a high-density sound insulation material, the interior of the shell 221 is solid, and a gap is left according to the shape of the simulated ear canal 222b, and then wrapped with materials such as silica gel.

[0038] The purpose of setting the simulated ear canal 222b is to imitate the physiological structure of the external ear canal of the real ear of the human body as much as possible, so as to obtain better detailed information. At the same time, since the simulated ear canal 222b is set at the front end of the microphone 222a, the external sound will first pass through this section of the simulated ear canal 222b after entering from the sound inlet 221a, and then reach the microphone 222a. In this way, the sound signal finally heard by the hearing-impaired wearing the hearing aid device will be the same as that directly transmitted from the real ear, with more complete detailed information.

[0039] The sound input module 22 of this embodiment may also include one or more of a Bluetooth input module 22B, an audio storage input module 22C, or a USB sound card input module 22D. The Bluetooth input module 22B can be connected to the mobile phone APP to facilitate the input of audio and other data in the mobile phone by Bluetooth transmission. Therefore, different methods can be selected according to actual needs for sound input, which has a wide range of applications and strong practicality.

[0040] The left channel output module 25A of this embodiment includes a left channel filter 251 and a left channel amplifier 252, the left channel filter 251 is electrically connected to the left channel DSP 24A, and the left channel amplifier 252 is electrically connected to the left channel filter 251. The right channel output module 25B includes a right channel filter 253 and a right channel amplifier 254, the right channel filter 253 is electrically connected to the right channel DSP 24B, and the right channel amplifier 254 is electrically connected to the right channel filter 253. The left channel amplifier 252 and the right channel amplifier 254 are both connected to the earphone 1. Thus, the filter is used to filter and select the sound signal processed by the DSP chip 24, and the amplifier is used to amplify the sound signal.

[0041] The sound signal input end of the microphone 222a is connected to the sound input hole 221a, and the electrical signal output end is connected to the DSP chip 24 through the connector 223 and the adapter 224. The housing 221 is provided with an earphone 1 insertion hole, and the earphone 1 is electrically connected to the controller 23 through the insertion hole and the wire.

[0042] The microphone array assembly 222 collects external sound signals through the sound inlet 221a on the housing 221 and converts them into electrical signals;

[0043] The DSP chip 24 is used to process the signal transmitted by the microphone array assembly 222; the DSP chip 24 of this embodiment adopts the PCM4204 chip of TI, and can be integrated and installed on a circuit board such as a PCB board.

[0044] The controller 23 is used to control the DSP chip 24 to switch the directionality or mode of the microphone 222a, etc. The controller 23 of this embodiment is a MCU (Microcontroller Unit).

[0045] The host 2 of this embodiment also includes a shell, and the sound input module 22, the controller 23, the DSP chip 24 and the sound output module 25 are all installed in the shell, and the shell is covered on the outer periphery of the adapter 224. Specifically, a groove matching the adapter 224 can be opened on the shell, and the adapter 224 is installed on the shell through the groove. Thus, the shell of the present invention can completely cover all components, and only the shell of the microphone array input module 22A is exposed. The shell shape of the host 2 can be similar to the shape of an MP3, which is beautiful and generous.

[0046] In this embodiment, the controller 23, DSP chip 24, filter, amplifier and other components can be integrated on a circuit board, and then the circuit board is installed in the shell and located at the bottom of the adapter 224. The bottom of the mounting groove 224a is provided with an interface connected to the connector 223, and the connector 223 is electrically connected to the DSP chip 24 on the circuit board through the interface.

[0047] The host 2 of this embodiment further includes an indicator light module 28, which is disposed on the housing 21 and connected to the controller 23. Thus, the indicator light is used to indicate the use status of the host 2, for example, when the indicator light flashes, it indicates that it is working.

[0048] The host 2 of this embodiment further includes a power supply module 26 , which is connected to the controller 23 , the indicator light module 28 , etc., and is used to supply power to each component.

[0049] The host 2 of this embodiment further includes a key module 27 and a display screen. The display screen and the key module 27 are arranged in the housing and connected to the controller 23. The display screen can be arranged on the front of the housing 21, and the key module 27 can be arranged at the bottom of the housing 21. Therefore, the arrangement of the key module 27 is convenient for the user to operate and realize mode switching, such as controlling the switch of the acquisition device or the control of the micro motor; the display screen is used to display the status and information of the device.

[0050] The hearing aid device can electrically and manually adjust the direction of the microphone 222a, thereby improving the recognition ability of the microphone 222a in a specified direction and reducing the limitations of the fixed microphone 222a.

[0051] When the microphone array input module 22A is used in conjunction with a box-type hearing aid (i.e., forming a host 2), the body can be used to shield or block the sound from the back of the body and the microphone 222a can be adjusted to point to the front of the body, thereby improving the communication between the user and the face-to-face person and reducing the interference of the sound from the back. However, an ear-hanging hearing aid or an ear canal hearing aid cannot use the body as a sound barrier, nor can the direction of the microphone 222a be adjusted. Therefore, in a noisy environment or a crowded environment, the poor effect of the hearing aid has always been the shortcoming of expensive hearing aids. The box-type hearing aid uses the microphone array input module 22A, which not only solves the shortcomings of current hearing aids, but also, because the box-type hearing aid is low in price (only one-tenth of the price of existing hearing aids), easy to use, and fashionable in appearance design, it can be matched with fashionable headphone products and can be popularized, thereby increasing the popularity of hearing protection and rehabilitation and reducing the incidence of hearing loss and hearing disabilities.

[0052] The multi-channel hearing aid device of the present invention effectively utilizes the advantage of the large internal space of the box-type hearing aid, and makes up for the shortcomings of various hearing aids in terms of sound collection and DSP system. The left and right channels are set in the DSP chip 24, and the microphone array input module 22A is used to independently collect sound, and then independently transmit it to the left and right channel DSP24B for processing, and finally output independently by the left channel output module 25A and the right channel output module 25B. The multi-channel hearing aid device of the present invention effectively simulates the form of sound collection by the left and right ears of the human body, greatly improving the listening effect in a noisy environment. At the same time, such a hearing aid has a low cost. It is estimated that the product of the present invention can help people in need save 90% of their expenses, and is expected to replace imported hearing aid products, allowing people in need to use more economical products to solve hearing and hearing protection problems.

[0053] Example 2

[0054] Figure 4 A multi-channel hearing aid device according to another embodiment is schematically shown.

[0055] like Figure 4 As shown, the structure of the multi-channel hearing aid device in this embodiment is basically the same as that in Embodiment 1, except that: the connection between the host 2 and the earphone 1 in this embodiment is Bluetooth connection.

[0056] like Figure 4As shown, the sound output module 25 of this embodiment also includes a Bluetooth transmitter module 25C, the left channel amplifier 252 and the right channel amplifier 254 are both connected to the Bluetooth transmitter module 25C, and the headset 1 is provided with a Bluetooth receiver module 11, which is in communication connection with the Bluetooth transmitter module 25C. The Bluetooth receiver module 11 and the Bluetooth transmitter module 25C of this embodiment are both commonly used commercial products; the Bluetooth transmitter module 25C can be integrated with the controller 23 on the same circuit board, and the Bluetooth receiver module 11 can be integrated on the control circuit board of the headset 1. The host 2 of the present invention and the headset 1 are connected by Bluetooth, and can be used separately and conveniently.

[0057] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A multi-channel hearing aid device, comprising an earphone (1) and a host (2), wherein the earphone (1) is connected to the host (2), and characterized in that: The host (2) comprises a sound input module (22), a controller (23), a DSP chip (24) and a sound output module (25), wherein the DSP chip (24) comprises a left channel DSP (24A) and a right channel DSP (24B), wherein the sound output module (25) comprises a left channel output module (25A) and a right channel output module (25B), wherein the sound input module (22) comprises a microphone array input module (22A), wherein the microphone array input module (22A) is connected to the left channel DSP (24A) and the right channel DSP (24B) respectively, wherein the left channel DSP (24A) is connected to the left channel output module (25A), wherein the channel DSP is connected to the right channel output module (25B), wherein the left channel output module (25A) and the right channel output module (25B) are both connected to the earphone (1); The microphone array input module (22A) comprises a housing (221) and a microphone array assembly (222) installed in the housing (221); the microphone array assembly (222) is installed in the housing (221); the microphone array assembly (222) comprises at least two microphones (222a); a sound inlet (221a) corresponding to the microphone (222a) is provided on the housing (221); and the sound inlet (221a) is connected to the microphone (222a); The microphone array input module (22A) further comprises a connector (223) and an adapter (224); the housing (221) is connected to the connector (223); the signal lines of the microphones (222a) are connected to the connector (223); a mounting groove (224a) is provided on the adapter (224); the connector (223) matches the mounting groove (224a); and the connector (223) is connected to the DSP chip (24) via the adapter (224); The host (2) further comprises a shell, wherein the sound input module (22), the controller (23), the DSP chip (24) and the sound output module (25) are all installed in the shell, and the shell is wrapped around the outer periphery of the adapter (224); The left channel output module (25A) comprises a left channel filter (251) and a left channel amplifier (252); the left channel filter (251) is connected to the left channel DSP (24A); the left channel amplifier (252) is connected to the left channel filter (251); the right channel output module (25B) comprises a right channel filter (253) and a right channel amplifier (254); the right channel filter (253) is connected to the right channel DSP (24B); the right channel amplifier (254) is connected to the right channel filter (253); and both the left channel amplifier (252) and the right channel amplifier (254) are connected to the earphone (1).

2. The multi-channel hearing aid device according to claim 1, characterized in that: The microphone array input module (22A) further comprises a turntable (225) and a driving member (226); the turntable (225) is fixedly mounted on the bottom of the adapter (224); and the driving member (226) is power-connected to the turntable (225) for driving the turntable (225) to rotate.

3. The multi-channel hearing aid device according to claim 1, characterized in that: The microphone array input module (22A) further comprises a fastener (227), one end of which is fixedly mounted on the inner wall of the mounting groove (224a), and the other end of which is matched with the outer wall of the connector (223).

4. The multi-channel hearing aid device according to claim 1, characterized in that: There are a plurality of sound inlet holes (221a), and the plurality of sound inlet holes (221a) are distributed in an array on the central circumference of the housing (221); the microphone array assembly (222) comprises a plurality of microphones (222a) and a plurality of simulated ear canals (222b); the number of the microphones (222a) and the simulated ear canals (222b) are the same as the number of the sound inlet holes (221a); ​​the microphone (222a) is connected to a DSP chip (24); one end of the simulated ear canal (222b) is connected to the sound inlet hole (221a), and the other end is connected to the microphone (222a).

5. The multi-channel hearing aid device according to claim 1, characterized in that: The sound input module (22) may also include one or more of a Bluetooth input module (22B), an audio storage input module (22C) or a USB sound card input module (22D).

6. The multi-channel hearing aid device according to claim 1, characterized in that: The sound output module (25) further comprises a Bluetooth transmitting module (25C), the left channel amplifier (252) and the right channel amplifier (254) are both connected to the Bluetooth transmitting module (25C), the earphone (1) is provided with a Bluetooth receiving module (11), and the Bluetooth receiving module (11) is communicatively connected to the Bluetooth transmitting module (25C).

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