CN116456236A - Oscillator wire shielding low-echo howling type bone conduction earphone and low-echo howling method thereof - Google Patents
Oscillator wire shielding low-echo howling type bone conduction earphone and low-echo howling method thereof Download PDFInfo
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- CN116456236A CN116456236A CN202310133056.3A CN202310133056A CN116456236A CN 116456236 A CN116456236 A CN 116456236A CN 202310133056 A CN202310133056 A CN 202310133056A CN 116456236 A CN116456236 A CN 116456236A
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- bone conduction
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000008054 signal transmission Effects 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 37
- 210000003454 tympanic membrane Anatomy 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000005672 electromagnetic field Effects 0.000 claims description 5
- 230000005389 magnetism Effects 0.000 claims description 5
- 241000209140 Triticum Species 0.000 claims description 4
- 235000021307 Triticum Nutrition 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000009954 braiding Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 3
- 239000010752 BS 2869 Class D Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1058—Manufacture or assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
- H04R2201/105—Manufacture of mono- or stereophonic headphone components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention relates to the technical field of bone conduction, in particular to a vibrator wire shielding low-echo howling bone conduction earphone and a low-echo howling method thereof. According to the invention, the shielding layer is coated outside the connecting wire, and the shielding layer is used for shielding the magnetic field generated when the connecting wire transmits signals, so that coupling interference of the magnetic field to signal transmission of the microphone module is avoided, and the noise reduction effect is achieved on the premise of not arranging a filter and applying an algorithm.
Description
Technical Field
The invention relates to the technical field of sound transmission, in particular to a vibrator wire shielding low-echo howling bone conduction earphone and a low-echo howling method thereof.
Background
The bone conduction headphones have many advantages: 1. the bone conduction earphone is used, the ear is not required to be plugged, the ear can be opened, and the damage to the tympanic membrane is reduced. 2. The voice of the other party can be clearly heard even under the noisy condition. 3. Even if the volume of the speech is very small, the meaning of the speech to be transmitted can be clearly expressed. 4. Many sports enthusiasts wear bone conduction headphones to avoid the unsanitary result of the plugged ears caused by perspiration. Bone conduction headset products have therefore been quite widespread in the market of the consumer field.
In the conventional bone conduction earphone under the scene of adopting the class-D power amplifier, during normal operation, due to the characteristics of the class-D power amplifier, the noise of middle and high frequencies is generated at the output end of the power amplifier besides normal audio signals, and is coupled into a circuit through a transmission line, so that the general practice in the industry is to add an LPF filter circuit at the output end of the power amplifier, the cut-off frequency of the filter is usually about 32khz, the harmonic interference of high frequencies is filtered, the MIC circuit is prevented from being interfered, but the addition of the LPF filter circuit can cause partial energy loss (increase of system power consumption), and the duration of the bone conduction earphone is shortened; if the software AEC echo suppression algorithm is adopted for echo cancellation, the problem of echo cannot be completely solved and the noise reduction effect of the communication environment can be directly affected due to the limitation of the algorithm of the DSP of the Bluetooth chip.
Disclosure of Invention
The invention provides a vibrator wire shielding low-echo howling bone conduction earphone and a low-echo howling method thereof, aiming at the problems of the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a vibrator wire shielding low-echo howling type bone conduction earphone, which comprises an earshell and a control module connected with the earshell, wherein a vibrator and a microphone module are arranged in the earshell, a plurality of connecting wires are arranged between the vibrator and the control module, a shielding layer is coated outside each connecting wire and connected between the microphone module and the control module, and the shielding layer is used for preventing electromagnetic fields among different connecting wires from being outwards diffusion coupled to influence the transmission of lead signals;
the shielding layer is made of conductive material or magnetism isolating material.
Further, the microphone module comprises a main microphone, an auxiliary microphone and a connecting plate, wherein the connecting plate comprises a main body, a first mounting part and a second mounting part, the main body is connected with the first mounting part through a bending part, the main body is connected with the second mounting part through a connecting part, the main microphone is mounted on the second mounting part, and the auxiliary microphone is mounted on the first mounting part;
the main wheat and the auxiliary wheat are arranged in a non-coplanar manner, and the connecting wires are connected to the main body.
Further, one side and the back end of the earmuff are respectively provided with a sound outlet, and the main microphone and the auxiliary microphone are respectively opposite to the two sound outlet.
Further, one end of the control module is provided with an ear hook, the ear hook is provided with a positioning hole, the back end of the main shell is provided with a positioning plug-in unit, and the positioning plug-in unit is inserted into the positioning hole; the positioning plug-in is provided with the hole of stepping down, and the hole of stepping down is communicated with the positioning hole, and the hole of stepping down is used for stepping down connecting wire and wire.
Further, the back end of the earmuff is provided with a yielding groove, one end of the earmuff, which is far away from the control module, is provided with a protective sleeve, the protective sleeve is sleeved in the yielding groove, and the positioning plug-in is inserted into the positioning hole through the protective sleeve;
the guiding structure is arranged between the positioning insert and the eardrum and is used for guiding the positioning insert to be clamped with the eardrum.
The invention also provides a bone conduction earphone low-echo howling method, which comprises the following steps of
The control module receives the signal and transmits the signal to the vibrator through a connecting wire;
the connecting wire generates an alternating magnetic field due to the transmission of signals, meanwhile, the signals are transmitted to the vibrator, and the vibrator vibrates according to the frequency of the signals to generate sound;
when the alternating magnetic field is generated, the shielding layer prevents the alternating magnetic field from diffusing outside the connecting wire, and avoids the corresponding current generated by the wire caused by the action of the alternating magnetic field on the wire connected with the microphone module, thereby reducing the generation of echo and howling.
Furthermore, the shielding layer is made of magnetism isolating materials in a braiding mode, the shielding layer is coated outside the connecting wires, and a protective layer is protected outside the shielding layer.
Furthermore, a shielding layer is also coated outside the wire arranged between the microphone module and the control module.
Further, the magnetic induction intensity at any point of the connecting line
Further, the microphone module is provided with a main microphone, an auxiliary microphone and a metal sheet, wherein the main microphone and the auxiliary microphone are connected with the lead through the metal sheet, and the main microphone and the auxiliary microphone face to one side and the bottom respectively.
The invention has the beneficial effects that: according to the invention, the shielding layer is coated outside the connecting wire connected with the vibrator, and the isolation of the alternating magnetic field generated by the connecting wire is realized through the shielding layer, so that the influence of the alternating magnetic field on the signal transmission of the microphone module is avoided, and the effect of reducing echo and howling is achieved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is an exploded view of the present invention.
Fig. 3 is an exploded view of the earshell of the present invention and its internal components.
Fig. 4 is a schematic view of the positioning insert of the present invention.
Fig. 5 is a schematic view of the earshell of the present invention.
Fig. 6 is a circuit diagram of the present invention.
Fig. 7 shows the TCLw measured value of the bone conduction headset without the shielding layer.
Fig. 8 shows the TCLw measured value of the bone conduction headset provided with the shielding layer.
Reference numerals: 1-earmuffs, 2-control modules, 3-vibrators, 4-microphone modules, 5-connecting wires, 6-wires, 7-shielding layers, 11-sound outlet holes, 12-earplugs, 13-positioning shells, 14-positioning plug-ins, 15-yielding holes, 16-yielding grooves, 17-guiding structures, 21-earhooks, 22-positioning holes, 23-protective sleeves, 41-primary microphones, 42-secondary microphones, 43-connecting plates, 44-main bodies, 45-first installation parts, 46-second installation parts, 47-bending parts and 48-connecting parts.
Detailed Description
The invention will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the invention. The present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 8, an echo and howling cancellation bone conduction earphone of the present embodiment includes an ear shell 1 and a control module 2 connected to the ear shell 1, wherein a vibrator 3 and a microphone module 4 are disposed in the ear shell 1, a plurality of connecting wires 5 are disposed between the vibrator 3 and the control module 2, and a wire 6 is connected between the microphone module 4 and the control module 2, and is characterized in that: each connecting wire 5 is coated with a shielding layer 7, and the shielding layer 7 is used for preventing electromagnetic fields between different connecting wires 5 from being outwards diffusion-coupled to influence signal transmission of the wires 6.
Specifically, from the ampere's law and the biot-savart law, it is known that: the changing electric field generates magnetic field, the changing magnetic field generates electric field, the electric field and the magnetic field are closely connected, when one of them changes, the other one appears, they excite each other to form unified electromagnetic field, the alternating electromagnetic field propagates from near to far in space at a certain speed, electromagnetic wave is formed, the electromagnetic wave mainly describes the periodic variation phenomenon of electric field quantity and magnetic field quantity at different space time points.
That is, during signal transmission, a changing magnetic field is necessarily generated around the connection wire 5, and the magnetic field interferes with the transmission of the signal of the wire 6, so that noise is generated in the sound received by the microphone module 4; the shielding layer 7 is coated on the periphery of the connecting wire 5, and the shielding layer 7 is made of conductive materials or magnetism isolating materials, so that the alternating magnetic field generated by the signal change of the connecting wire 5 can be effectively shielded, interference to sound signals received by the microphone module 4 is avoided, and noise is avoided.
In this embodiment, the microphone module 4 includes a main microphone 41, a sub microphone 42, and a connection board 43, where the connection board 43 includes a main body 44, a first mounting portion 45, and a second mounting portion 46, the main body 44 is connected to the first mounting portion 45 through a bending portion 47, the main body 44 is connected to the second mounting portion 46 through a connecting portion 48, the main microphone 41 is mounted on the second mounting portion 46, and the sub microphone 42 is mounted on the first mounting portion 45;
the main microphone 41 and the auxiliary microphone 42 are arranged in a non-coplanar manner, and the connecting wires 5 are connected to the main body 44.
Namely, the main microphone 41 and the auxiliary microphone 42 face two directions respectively, so that the sound emitted by a user can be received more clearly, and the accuracy and stability of sound conduction are ensured.
In this embodiment, the sound outlet holes 11 are respectively provided at one side and the back end of the ear shell 1, and the main microphone 41 and the auxiliary microphone 42 respectively face the two sound outlet holes 11.
The arrangement of the sound outlet 11 facilitates the main microphone 41 and the auxiliary microphone 42 to capture and transmit the sound signals more accurately, and reduces the distortion degree.
In this embodiment, the shielding layer 7 is coated on the outer surface of the conductive wire 6, so as to further improve the shielding effect and avoid the interference between the magnetic fields of the conductive wire 6 and the connection wire 5.
In this embodiment, the ear shell 1 is a hollow structure with an opening at one end, the earplug 12 is installed at the opening of the ear shell 1, and the vibrator 3 is located in the ear shell 1 and is disposed in the earplug 12.
During actual use, be provided with positioning shell 13 between earmuff 1 and the earplug 12, oscillator 3 installs in positioning shell 13 to guarantee that the vibration that oscillator 3 produced can transmit to the human body with the state that energy loss is minimum, let the sound information that the human body received more accurate.
In this embodiment, an ear hook 21 is disposed at one end of the control module 2, a positioning hole 22 is disposed in the ear hook 21, a positioning plug-in 14 is disposed at the back end of the main casing, and the positioning plug-in 14 is plugged in the positioning hole 22; the positioning insert 14 is provided with a relief hole 15, the relief hole 15 communicates with the positioning hole 22, and the relief hole 15 is used for giving way to the connecting wire 5 and the conducting wire 6.
The assembly between the ear hook 21 and the earmuff 1 is completed by inserting the positioning plug-in 14 into the positioning hole 22, so that the connecting wire 5 and the lead 6 can enter the earmuff 1 through the abdication hole 15, and the effect of respectively connecting with the vibrator 3 and the main body 44 is realized; the abdication holes 15 can also play a role in arranging wires, so that the wires are ensured not to be mixed.
In this embodiment, the back end of the earshell 1 is provided with a yielding groove 16, one end of the ear hook 21 away from the control module 2 is provided with a protecting sleeve 23, the protecting sleeve 23 is arranged in the yielding groove 16, and the positioning insert 14 is inserted into the positioning hole 22 through the protecting sleeve 23.
By arranging the abdication groove 16, the protection sleeve 23 is partially embedded in the earmuff 1, so that the structure of the invention is more compact, and the strength of the connection between the protection sleeve 23 and the earmuff 1 is ensured.
In this embodiment, a guiding structure 17 is provided between the positioning insert 14 and the earmuff 1, and the guiding structure 17 is used for guiding the positioning insert 14 to be clamped with the earmuff 1, so that the assembly of the two is simpler, and the automatic production assembly is facilitated.
Example 2
The embodiment provides a bone conduction earphone low-echo howling method, which comprises the following steps of
The control module 2 receives the signal and transmits the signal to the vibrator 3 through a connecting wire;
the connecting wire 5 generates an alternating magnetic field due to the transmission of the signal, and simultaneously transmits the signal to the vibrator 3, and the vibrator 3 vibrates according to the frequency of the signal to generate sound;
when the alternating magnetic field is generated, the shielding layer 7 prevents the alternating magnetic field from diffusing outside the connecting wire 5, and avoids the corresponding current generated by the wire 6 caused by the action of the alternating magnetic field on the wire 6 connected with the microphone module 4, thereby reducing the generation of echo and howling.
That is, the invention adopts a physical shielding mode, and a shielding layer 7 is arranged at the connecting line for signal transmission from the source of echo howling, so that the magnetic field generated by the connecting line for transmitting signals to the vibrator can not be diffused to the outside, and noise signals can not be generated by the alternating magnetic field generated by the connecting line 5 around the wire in the process of transmitting signals, thereby avoiding the occurrence of echo howling.
In this embodiment, the shielding layer 7 is made of a magnetic isolation material by braiding, the shielding layer 7 is coated outside the connecting wire 5, and a protection layer is protected outside the shielding layer 7. Namely, the shielding layer 7 completely wraps the connecting wire 5, so that the shielding effect on the alternating magnetic field is ensured, and the protective layer plays a role in protecting the shielding layer 7 and the connecting wire.
In this embodiment, the wires 6 disposed between the microphone module 4 and the control module 2 are also covered with a shielding layer 7.
In the present embodiment, the magnetic induction intensity at any point of the connecting line is calculated by the following formula
It can be seen that, as long as the transmitted signal is changed, the current is necessarily changed, so that the magnetic induction intensity is changed, and an alternating magnetic field is generated, the change of the magnetic field necessarily causes the current to be changed, and the signal is transmitted through the current, so that when the magnetic field around the wire is changed, the current is necessarily changed, and the current is distorted compared with the original current, namely, the reasons of howling and echo are generated.
By comparing the scheme of the invention with the prior art, the following steps are shown: if the shielding layer 7 is not arranged, the TCLw actual measurement values are 31.69dB, 32.73dB and 37.15dB, and obviously do not meet the 3GPP standard; when the shielding layer 7 is arranged, the TCLw actual measurement values correspond to 60.90dB, 62.28dB and 60.87dB, and the 3GPP standard is met.
The present invention is not limited to the preferred embodiments, but is intended to be limited to the following description, and any modifications, equivalent changes and variations in light of the above-described embodiments will be apparent to those skilled in the art without departing from the scope of the present invention.
Claims (10)
1. A vibrator line shielding low echo whistle type bone conduction earphone is characterized in that: the device comprises an eardrum and a control module connected to the eardrum, wherein a vibrator and a microphone module are arranged in the eardrum, a plurality of connecting wires are arranged between the vibrator and the control module, a shielding layer is coated outside each connecting wire, which is connected between the microphone module and the control module, and the shielding layer is used for preventing electromagnetic fields between different connecting wires from being outwards diffusion-coupled to influence the transmission of the wire signals;
the shielding layer is made of conductive material or magnetism isolating material.
2. The oscillator wire-shielded low-echo howling type bone conduction headset of claim 1, wherein: the microphone module comprises a main microphone, an auxiliary microphone and a connecting plate, wherein the connecting plate comprises a main body, a first mounting part and a second mounting part, the main body is connected with the first mounting part through a bending part, the main body is connected with the second mounting part through a connecting part, the main microphone is mounted on the second mounting part, and the auxiliary microphone is mounted on the first mounting part;
the main wheat and the auxiliary wheat are arranged in a non-coplanar manner, and the connecting wires are connected to the main body.
3. The oscillator wire-shielded low-echo howling type bone conduction headset of claim 2, wherein: one side and the back end of the earmuff are respectively provided with a sound outlet hole, and the main microphone and the auxiliary microphone are respectively opposite to the two sound outlet holes.
4. The oscillator wire-shielded low-echo howling type bone conduction headset of claim 1, wherein: an ear hook is arranged at one end of the control module, a positioning hole is formed in the ear hook, a positioning plug-in unit is arranged at the back end of the main shell, and the positioning plug-in unit is inserted into the positioning hole; the positioning plug-in is provided with the hole of stepping down, and the hole of stepping down is communicated with the positioning hole, and the hole of stepping down is used for stepping down connecting wire and wire.
5. The oscillator wire-shielded low-echo howling type bone conduction headset of claim 1, wherein: the back end of the earmuff is provided with a yielding groove, one end of the earmuff, which is far away from the control module, is provided with a protective sleeve, the protective sleeve is sleeved in the yielding groove, and the positioning plug-in is inserted into the positioning hole through the protective sleeve;
the guiding structure is arranged between the positioning insert and the eardrum and is used for guiding the positioning insert to be clamped with the eardrum.
6. A bone conduction earphone hypoechoic howling method is characterized in that: comprising
The control module receives the signal and transmits the signal to the vibrator through a connecting wire;
the connecting wire generates an alternating magnetic field due to the transmission of signals, meanwhile, the signals are transmitted to the vibrator, and the vibrator vibrates according to the frequency of the signals to generate sound;
when the alternating magnetic field is generated, the shielding layer prevents the alternating magnetic field from diffusing outside the connecting wire, and avoids the corresponding current generated by the wire caused by the action of the alternating magnetic field on the wire connected with the microphone module, thereby reducing the generation of echo and howling.
7. The bone conduction headset hypoechoing howling method of claim 6 wherein: the shielding layer is made of magnetism isolating materials in a braiding mode, the shielding layer is coated outside the connecting wires, and a protective layer is protected outside the shielding layer.
8. The bone conduction headset hypoechoing howling method of claim 6 wherein: the wire arranged between the microphone module and the control module is also coated with a shielding layer.
9. The bone conduction headset hypoechoing howling method of claim 6 wherein: magnetic induction intensity at any point of connecting line
10. The bone conduction headset hypoechoing howling method of claim 6 wherein: the microphone module is provided with a main microphone, an auxiliary microphone and a metal sheet, wherein the main microphone and the auxiliary microphone are connected with the lead through the metal sheet, and the main microphone and the auxiliary microphone face to one side and the bottom respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310133056.3A CN116456236A (en) | 2023-02-16 | 2023-02-16 | Oscillator wire shielding low-echo howling type bone conduction earphone and low-echo howling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310133056.3A CN116456236A (en) | 2023-02-16 | 2023-02-16 | Oscillator wire shielding low-echo howling type bone conduction earphone and low-echo howling method thereof |
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| CN116456236A true CN116456236A (en) | 2023-07-18 |
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| CN202310133056.3A Pending CN116456236A (en) | 2023-02-16 | 2023-02-16 | Oscillator wire shielding low-echo howling type bone conduction earphone and low-echo howling method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080088015A (en) * | 2007-03-28 | 2008-10-02 | 이성태 | Voice communication transceiver with noise reduction and prevent howling |
| CN205430534U (en) * | 2015-06-30 | 2016-08-03 | 唐由豫 | Noise proof earplug microphone of preventing uttering long and high -pitched sounds |
| KR20160137291A (en) * | 2015-05-22 | 2016-11-30 | 중소기업은행 | Headset with a function for cancelling howling and echo |
| CN209134644U (en) * | 2018-12-21 | 2019-07-19 | 中智益健（深圳）科技有限公司 | A kind of hearing aid that can weaken Audio squealing under high gain state |
| CN210431880U (en) * | 2019-08-16 | 2020-04-28 | 福建太尔集团股份有限公司 | Bone conduction hearing aid with squeaking prevention function |
| CN218041738U (en) * | 2022-08-11 | 2022-12-13 | 东莞市猎声电子科技有限公司 | Echo eliminating structure of bone conduction earphone |
-
2023
- 2023-02-16 CN CN202310133056.3A patent/CN116456236A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080088015A (en) * | 2007-03-28 | 2008-10-02 | 이성태 | Voice communication transceiver with noise reduction and prevent howling |
| KR20160137291A (en) * | 2015-05-22 | 2016-11-30 | 중소기업은행 | Headset with a function for cancelling howling and echo |
| CN205430534U (en) * | 2015-06-30 | 2016-08-03 | 唐由豫 | Noise proof earplug microphone of preventing uttering long and high -pitched sounds |
| CN209134644U (en) * | 2018-12-21 | 2019-07-19 | 中智益健（深圳）科技有限公司 | A kind of hearing aid that can weaken Audio squealing under high gain state |
| CN210431880U (en) * | 2019-08-16 | 2020-04-28 | 福建太尔集团股份有限公司 | Bone conduction hearing aid with squeaking prevention function |
| CN218041738U (en) * | 2022-08-11 | 2022-12-13 | 东莞市猎声电子科技有限公司 | Echo eliminating structure of bone conduction earphone |
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