CN207744142U - A kind of multi-functional bone conduction hearing aid system - Google Patents

A kind of multi-functional bone conduction hearing aid system Download PDF

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Publication number
CN207744142U
CN207744142U CN201721424273.4U CN201721424273U CN207744142U CN 207744142 U CN207744142 U CN 207744142U CN 201721424273 U CN201721424273 U CN 201721424273U CN 207744142 U CN207744142 U CN 207744142U
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module
hearing aid
bone conduction
sound
noise
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褚建峰
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Shenzhen Kai Yuan Digital Technology Co Ltd
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Shenzhen Kai Yuan Digital Technology Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50Customised settings for obtaining desired overall acoustical characteristics
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/43Signal processing in hearing aids to enhance the speech intelligibility

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

The utility model is intended to provide a kind of multi-functional bone conduction hearing aid system, which includes:Sound collection and transmitting module and sound receive and bone conduction hearing aid module.The utility model is the osteoacusis assisting hearing system of hearing aid when making a phone call, is the hearing assistant system of assisting hearing obstacle person chat when not making a phone call, and is provided for person hard of hearing and multi-functional auxiliary listens system, the number of components few, easy to use.

Description

A kind of multi-functional bone conduction hearing aid system
Technical field
The utility model is related to a kind of multi-functional bone conduction hearing aid systems.
Background technology
Hearing aid is a kind of small-sized public address equipment of help Deaf and Hard of Hearing Talents compensation hearing loss.Hearing aid all include with Lower 6 elements:Microphone, amplifier, receiver, earplug, volume control circuit, power supply.Wherein microphone or Mike Wind is microphone, receives sound and sound is converted electric wave form, i.e., electroacoustic is converted into electric energy.Amplifier amplifies electric signal, Earphone i.e. receiver convert electrical signals into acoustical signal, and earplug fills in external auditory canal, to have the function that listen to sound.Now Popular hearing aid is exactly an audio-frequency amplifier, its function is to increase acoustic intensity and incoming ear as distortionless as possible It is interior.The acoustic energy of sound cannot directly amplify, and need that acoustical signal is first converted to electric signal, acoustic energy is reconverted into after amplification.Input Device is made of the part such as microphone (microphone, microphone), magnetic induction loop, and effect is that the acoustic energy of input is converted to electric energy simultaneously It is sent to amplifier, after amplifier amplifies electric signal, is resent to energy converter, output transducer is shaken by loudspeaker or osteoacusis Dynamic device composition, effect are that the electric signal of amplification is converted to acoustic energy or kinetic energy output.Power supply is supplied with hearing aid work energy The pith of amount.
Ossiphone is exactly the hearing aid for the vibrator that energy converter is osteoacusis, is by bone conduction vibrator close to bone Head, makes vibrational energy pass through bone conduction at cochlea, is usually used closely pastes bone conduction vibrator and human skull at present The bone conduction vibrator that left and right zygomatic arch is in contact hears sound this makes it possible to help hearing disabilities patient.
But current ossiphone has the following problems a little:
1. the frequency of use of current mobile phone is very high, people is in work and daily communation highly dependent upon mobile electricity Words, current few products specifically for the assisting hearing used when making a phone call, cause person hard of hearing inconvenience.
2. input unit (microphone or microphone) and energy converter (bone conduction vibrator) work as power because apart from closer Will produce when bigger it is strong utter long and high-pitched sounds, solve the problems, such as this by reducing volume at present, cause sound too small, cannot be satisfied and listen The demand of power disabled patient.
3. receiver (bone conduction vibrator) is fixed on by bone anchor on bone, need to perform the operation, patient is more painful.
4. wear-type is inconvenient to move, once old man's running is difficult to fix, cause normally hear sound.
Utility model content
To overcome the defect of the above-mentioned prior art, the utility model embodiment to provide a kind of multi-functional bone conduction hearing aid system System is the osteoacusis assisting hearing system of hearing aid when making a phone call, when not making a phone call is listening for assisting hearing obstacle person chat Power auxiliary system, and it need not conduct sound by the ear-drum of person hard of hearing, will not injure the ear-drum of person hard of hearing, no It can cause secondary injury, it is easy to use, the number of components is few, production cost is low.
In order to achieve the above object, a kind of multi-functional bone conduction hearing aid system is provided, including:Sound collection and transmitting mould Block and sound receive and bone conduction hearing aid module;Sound collection and transmitting module include receiving ambient sound and being converted into electricity The sound receiver of signal, and electric signal is sent to the sound and is received and the signal of bone conduction hearing aid module transmitting mould Block, signal emission module are electrically connected with sound receiver;It includes that may be selected to receive that sound, which is received with bone conduction hearing aid module, Signal receiving module, the electric signal by reception for the electric signal that the electric signal or mobile terminal that signal emission module is sent are sent The bone conduction hearing aid module for handling and generating vibration osteoacusis to user.Person hard of hearing uses the hearing assistance system as a result, It is the osteoacusis assisting hearing system of hearing aid when making a phone call, is the hearing auxiliary system of assisting hearing obstacle person chat when not making a phone call System, multifunctional use.
Preferably, sound collection and transmitting module, sound receive separately positioned with bone conduction hearing aid module.Separate type is set Meter, two modules are individually positioned in different location, and the two is wirelessly connected, and when use is not influenced by one.
Preferably, sound collection and transmitting module are integrated on a wearable device, and sound receives and bone conduction hearing aid mould Block is integrated on a bone conduction earphone.
Preferably, it is electrically connected between sound receiver and signal emission module and is provided with voice de-noising processing module.
Preferably, sound receiver and voice de-noising processing module have small size dual microphone voice collecting noise reduction mould Group, the module include two-microphone array module, have main microphon and secondary microphone, acquire main microphon and secondary wheat in real time Gram wind noise source and speech source;Power spectrum module, the voice signal acquired in real time to main microphon and secondary microphone and makes an uproar Sound component power value is overlapped to obtain performance number superposition value, and power spectrum is calculated;Noise cancellation module is used for basis Power spectrum carries out noise estimation, adaptive-filtering, speech enhan-cement, module output, and noise reduction process is carried out to voice;It is variable to put Big device output module, has variable amplifier, for the analog signal as obtained by the noise cancellation module processing into Row amplification output.By the small size dual microphone voice collecting noise reduction module, sound receiver will can be received effectively The noise removal arrived keeps the sound that Deaf and Hard of Hearing Talents hears purer.
Preferably, the distance between two microphones are between 10-20mm.
Preferably, the distance between two microphones are between 10-14mm.
Preferably, microphone array module acquires main Mike and secondary microphone noise source in real time and speech source includes:
The performance number of acquisition major-minor microphone voice signal and noise signal in real time, uses following equations:
PM1M1=tr1(TA1+TO1)
PM2M2=tr2(TA2+TO2)
Wherein, PM1M1It is the acquisition performance number of main microphon, tr1It is the time parameter that main microphon acquires in real time, TA1It is The voice source value of main microphon acquisition, TO1It is the noise source value of main microphon acquisition.PM2M2It is the acquisition performance number of secondary microphone, tr2It is the time parameter that secondary microphone acquires in real time, TA2It is the voice source value of secondary microphone acquisition, TO2It is secondary microphone acquisition Noise source value;
The voice signal and noise component(s) performance number that main microphon and secondary microphone acquire in real time in power spectrum module It is overlapped, portals placement location and microphone gain parameter using two microphones of major-minor to be calculated:
PLeoc1=PM1M1*LM1M1M2M2*KM1M1M2M2
PLeoc2=PM2M2*LM1M1M2M2*KM1M1M2M2
Wherein, PLeoc1And PLeoc2It is the voice signal and noise component(s) power that main microphon and secondary microphone acquire in real time It is worth superposition value, PM1M1It is the acquisition performance number of main microphon, PM2M2It is the acquisition performance number of secondary microphone, LM1M1M2M2It is main Mike Wind or secondary microphone are to the distance of signal source, KM1M1M2M2It is the gain of main microphon or secondary microphone;
The voice signal and noise component(s) that main microphon and secondary microphone acquire in real time is calculated in power spectrum module After power superposition value, power spectrum is finally calculated:
Wherein, Δ S (Z, Y) is main microphon and secondary microphone voice signal and noise component(s) power spectrum, PM1M1It is The acquisition performance number of main microphon, PM2M2It is the acquisition performance number of secondary microphone, PLeoc1And PLeoc2It is main microphon and secondary Mike The voice signal and noise component(s) performance number superposition value that wind acquires in real time;
Noise cancellation module carries out noise estimation using following equations to main microphon and secondary microphone:
Wherein, GQM1M2It is the noise estimation of main microphon and secondary microphone, PM1M1It is the acquisition performance number of main microphon, PM2M2It is the acquisition performance number of secondary microphone, KM1M1M2M2It is the gain of main microphon or secondary microphone, Δ S (Z, Y) is main Mike Wind and secondary microphone voice signal and noise power Spectrum ratio;
The adaptive-filtering noise reduction of noise cancellation module, speech enhan-cement use following equation:
Wherein, T (WB) it is adaptive-filtering speech enhan-cement function, PM1M1It is the acquisition performance number of main microphon, PM2M2It is secondary The acquisition performance number of microphone, GQM1M2It is main microphon and the estimation of secondary microphone noise, LM1M1M2M2It is main microphon or secondary Mike Wind is to the distance of signal source, QSIt is Adaptive Control Coefficient;
Variable amplifier output module exports analog quantity to noise reduction and amplifies by variable amplifier, uses following equations:
Wherein, AVIt is the variable amplifier amplification factor, RK2It is variable resistance, RK1It is fixed resistance.
Preferably, it further includes that the MIC being electrically connected with signal receiving module converses that sound, which is received with bone conduction hearing aid module, Circuit module.
Preferably, bone conduction hearing aid module includes osteoacusis drive module and osteoacusis horn module.
Preferably, sound collection and transmitting module further include the first battery module and the first RF radio frequency antenna modules, sound Reception device and signal emission module further include the second battery module, the 2nd RF radio frequency antenna modules.
Preferably, sound collection and transmitting module further include to the first charging circuit module of the first charging battery module, The first key group being connect with signal emission module telecommunications and the first LED light display module.
Preferably, it further includes to the second charging circuit of the second charging battery module that sound, which is received with bone conduction hearing aid module, Module, the second key group being connect with signal receiving module telecommunications and the second LED light display module.
Preferably, signal emission module is Bluetooth transmission module, and signal receiving module is bluetooth receiving module.
The utility model compared with prior art the advantages of be:
1, the utility model need not conduct sound by the ear-drum of person hard of hearing, will not injure the ear of person hard of hearing Film will not cause secondary injury;
2, the utility model can assisting hearing obstacle person take phone;
3, the utility model can voluntarily adjust sound size according to the demand of Deaf and Hard of Hearing Talents, need not test and match;
4, the utility model is worn more comfortable, not easily to fall off, can be used when movable.
When 5, having phone to call in, the utility model can automatically switch to sound reception and bone conduction hearing aid module, can lead to It crosses button and connects mobile phone, realize the hearing aid during making a phone call;After disconnecting mobile phone, sound collection and transmitting module can be with The voice of surrounding is listened to, and is sent to sound reception and bone conduction hearing aid module, Deaf and Hard of Hearing Talents and people around may be implemented Proper communication, play the role of auxiliary listen;
Description of the drawings
Fig. 1 is the principle schematic of the utility model first embodiment sound collection and transmitting module;
Fig. 2 is the principle schematic of the utility model first embodiment sound reception and bone conduction hearing aid module;
Fig. 3 is the utility model first embodiment for realizing the principle schematic of phone is taken;
Fig. 4 is the structural schematic diagram that the utility model first embodiment wears sound reception and bone conduction hearing aid module;
Fig. 5 is the structural schematic diagram that the utility model first embodiment wears sound collection and transmitting module;
Fig. 6 is principle schematic when the utility model is applied to several users exchange;
Fig. 7 is the flow chart of dual microphone voice collecting noise reduction module in the utility model 3rd embodiment;
Fig. 8 is the packaging pin figure of diamylose gram voice collecting noise reduction module in the utility model 3rd embodiment.
Specific implementation mode
In the utility model description, the orientation or positional relationship of the instructions such as term "upper", "lower", " preceding " and " rear " is base In orientation or positional relationship shown in the drawings, it is merely for convenience of description the utility model rather than requires the utility model necessary With specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
First embodiment
A kind of multi-functional bone conduction hearing aid system of the utility model first embodiment, including sound collection and transmitting module 01 and sound receive with bone conduction hearing aid module 02.
Sound collection and transmitting module 01 include sound receiver 011 and signal emission module 013.Sound receiver 011 reception ambient sound is simultaneously converted into electric signal, and electric signal is sent to sound reception and is helped with osteoacusis by signal emission module 013 Module 02, signal emission module 013 is listened to be electrically connected with sound receiver 011.
It includes signal receiving module 020 and bone conduction hearing aid module, the signal that sound, which is received with bone conduction hearing aid module 02, Receiving module 020 may be selected to receive the electric signal that the signal emission module is sent or the electric signal that mobile terminal is sent.Bone Conduction hearing aid module is by the Electric signal processing of the reception and generates vibration osteoacusis to user.
By above two module, following hearing assistance system application method can be formed:When not making a phone call, sound receiver 011 receives ambient sound, and sound is converted to electric wave form, signal receiving module is passed to by signal emission module 013 020;When making a phone call, mobile terminal is connect with signal receiving module 020, and the electric signal that mobile terminal is sent passes to signal reception Module 020 is handled by bone conduction hearing aid module by signal and generates vibration osteoacusis to user.
Further, sound collection and transmitting module 01, sound receive separately positioned with bone conduction hearing aid module 02.
With reference to Fig. 5, as a preferred embodiment, sound collection and transmitting module 01 are integrated on a wearable device, can be with The positions such as front, wrist, the arm of user are worn on, can also be placed on above desk.
With reference to Fig. 4, as a preferred embodiment, sound is received is integrated in a bone conduction earphone with bone conduction hearing aid module 02 On, sound receives tight with left and right zygomatic arch and left and right mastoid process respectively under the limitation of elastic force fixing bracket with bone conduction hearing aid module 02 Contiguity is touched, and can be sent out sufficiently large power and be pushed bone conduction vibrator, can be placed on there are many wearing mode and wearing position On front side of ear, after ear, the crown, forehead, equal positions after brain.
From the foregoing, it will be observed that the utility model wearing is more comfortable, and it is not easily to fall off, it can be used when movable, and due to sound collection It is separately positioned with bone conduction hearing aid module 02 with transmitting module 01, sound reception, it ensure that sound collection and transmitting module 01, sound Sound the distance between is received with bone conduction hearing aid module 02, will not be generated when power is bigger it is strong utter long and high-pitched sounds, meet The demand of hearing disabilities patient.
Referring to Fig.1, sound collection and transmitting module 01 further include the first battery module 016, the first RF radio frequency antenna modules 014, it is electrically connected between sound receiver 011 and signal emission module 013 and is provided with voice de-noising processing module 012;Make For preferred embodiment, signal emission module 013 is Bluetooth transmission module, and sound receiver 011 acquires for Microphone Array Speech Device, and sound collection and transmitting module 01 are additionally provided with the first charging circuit module to charge to the first battery module 016 015, the first key group 017 for being connect with 013 telecommunications of signal emission module, first connect with 013 telecommunications of signal emission module LED light display module 018.Sound collection and transmitting module 01 can pass through the first key group according to the demand of Deaf and Hard of Hearing Talents 017 voluntarily adjusts sound size, need not test and match, and the first battery module 016 can be given by the first charging circuit module 015, Ensure the service life of sound collection and transmitting module 01, while the first LED light display module 018 can inform user's sound Whether acquisition and transmitting module 01 work normally.
With reference to Fig. 2, it further includes being electrically connected with signal receiving module 020 that sound, which is received with bone conduction hearing aid module 02, MIC speaking circuits module 019, the second battery module 026, the 2nd RF radio frequency antenna modules 021, bone conduction hearing aid module includes bone Conduct drive module 023 and osteoacusis horn module 024.Preferably, signal receiving module 020 is that bluetooth receives mould Block, and sound receives and is additionally provided with the second charging circuit mould to charge to the second battery module 026 with bone conduction hearing aid module 02 Block 025, the second key group 027 being connect with 020 telecommunications of signal receiving module, connect with 020 telecommunications of signal receiving module Two LED light display modules 022.Sound is received uses bone conduction hearing aid module with bone conduction hearing aid module 02, need not be by listening The ear-drum of power obstacle person conducts sound, will not injure the ear-drum of person hard of hearing, will not cause secondary injury, while can basis The demand of Deaf and Hard of Hearing Talents voluntarily adjusts sound size by the second key group 027, need not test and match, and passes through the second charging electricity Road module 025 can give the second battery module 026, and guarantee sound receives and the service life of bone conduction hearing aid module 02, and second LED light display module 022 can inform whether the reception of user's sound works normally with bone conduction hearing aid module 02.
Therefore, sound collection and transmitting module 01 can be used as individual accessory and occur, and cooperation sound reception is helped with osteoacusis Module 02 is listened to realize auxiliary auditory function;Sound collection and transmitting module 01, sound reception and bone conduction hearing aid module can also be made One entirety, realizes auxiliary auditory function.
In addition, with reference to Fig. 6, the Bluetooth transmission module in sound collection and transmitting module 01 may be used it is multiple, using more It is a can correspond to multiple sound receive with bone conduction hearing aid module 02, realize multiple Deaf and Hard of Hearing Talents it is multiple it is auxiliary together listen, reach The effect chatted together to multiple Deaf and Hard of Hearing Talents, can be used for that Deaf and Hard of Hearing Talents's meeting is auxiliary to listen system.
Second embodiment
Second embodiment provides a kind of hearing assistance system corresponding with multi-functional bone conduction hearing aid system in first embodiment Application method.Specially:When not making a phone call, the sound receiver receives ambient sound, and sound is converted to electric wave form, The signal receiving module is passed to by the signal emission module;When making a phone call, mobile terminal receives mould with the signal Block connects, and the electric signal that mobile terminal is sent passes to the signal receiving module, is handled by bone conduction hearing aid module by signal Vibration osteoacusis is generated to user.
Provide two kinds of operating modes:When not making a phone call, assisting hearing obstacle person chat;When making a phone call, assisting hearing Obstacle person takes phone.
Pattern one, when not making a phone call, assisting hearing obstacle person chats, and concrete operating principle is as follows:
Sound receiver 011 (Microphone Array Speech acquisition) in sound collection and transmitting module 01 receives people around Sound include the sound of user oneself, and sound can be converted to electric wave form, i.e., acoustic energy is converted into electric energy, voice drop Processing module of making an uproar 012 disappears the environmental noise of surrounding, and treated, and electric signal passes to sound by Bluetooth transmission module connects It receives and is received and the bluetooth receiving module and sound collection and hair in bone conduction hearing aid module 02 with bone conduction hearing aid module 02, sound Penetrate the Bluetooth transmission module connection in module 01, the electric signal of the other side received after the processing of osteoacusis drive module 023, The vibrations of different frequency are generated by osteoacusis horn module 024, the spiral organ in vibrations stimulation ear makes person hard of hearing can be with Hear sound.
Pattern two, when making a phone call, assisting hearing obstacle person takes phone, and concrete operating principle is as follows:
With reference to Fig. 3, during above-mentioned auxiliary is chatted, if mobile phone B makes mobile phone A, mobile phone A is logical It crosses bluetooth to connect with sound reception with the bluetooth receiving module in bone conduction hearing aid module 02, the electric signal of input passes through osteoacusis After drive module 023 amplifies signal, it is input to osteoacusis horn module 024;Difference is generated by osteoacusis horn module 024 The vibrations of frequency, vibrations stimulate the spiral organ in ear that person hard of hearing is allow to hear sound;After person hard of hearing hears sound Answer is made, the voice signal sent out is converted to electric signal by MIC speaking circuits module 019 and returns to A by Bluetooth channels Mobile phone achievees the effect that help person hard of hearing mobile phone communication.
In other words, when having phone to call in, the utility model can automatically switch to sound and receive and bone conduction hearing aid module 02, mobile phone can be connected by button, realize the hearing aid during making a phone call;After disconnecting mobile phone, sound collection and transmitting Module 01 can listen to the voice of surrounding, and be sent to sound reception and bone conduction hearing aid module 02, and dysaudia may be implemented The proper communication of patient and people around play the role of auxiliary listen.
3rd embodiment
In 3rd embodiment, sound receiver 011 is specially Microphone Array Speech harvester, sound receiver Special small size dual microphone voice collecting noise reduction module is used together with voice de-noising processing module.
As shown in fig. 7, main Mike and the real-time acquisition noise of secondary microphone, 60 and speech source 70, wherein noise source can be more A, gatherer process step 61 and step 71 specifically include:The power of acquisition major-minor microphone voice signal and noise signal in real time Value, uses following equations:
PM1M1=tr1(TA1+TO1) (1)
PM2M2=tr2(TA2+TO2) (2)
Wherein PM1M1It is the acquisition performance number of main microphon, tr1It is the time parameter that main microphon acquires in real time, TA1It is main The voice source value of microphone acquisition, TO1It is the noise source value of main microphon acquisition.PM2M2It is the acquisition performance number of secondary microphone, tr2It is the time parameter that secondary microphone acquires in real time, TA2It is the voice source value of secondary microphone acquisition, TO2It is secondary microphone acquisition Noise source value.
Then, step 62:The voice signal and noise component(s) performance number that main microphon and secondary microphone acquire in real time carry out Superposition portals placement location and microphone gain parameter to be calculated using two microphones of major-minor:
PLeoc1=PM1M1*LM1M1M2M2*KM1M1M2M2 (3)
PLeoc2=PM1M2*LM1M1M2M2*KM1M1M2M2 (4)
Wherein, PLeoc1And PLeoc2It is the voice signal and noise component(s) power that main microphon and secondary microphone acquire in real time It is worth superposition value, PM1M1It is the acquisition performance number of main microphon, PM2M2It is the acquisition performance number of secondary microphone, LM1M1M2M2It is main Mike Wind or secondary microphone are to the distance of signal source, KM1M1M2M2It is the gain of main microphon or secondary microphone.The main microphon and secondary wheat The gain of gram wind is microphone parameter attribute itself, can be checked in by microphone products parameter.
Then, the voice signal and noise component(s) power superposition value that main microphon 61 and secondary microphone 71 acquire in real time are obtained Later, step 63:Power spectrum is calculated:
Wherein, Δ S (Z, Y) is main microphon and secondary microphone voice signal and noise component(s) power spectrum,
PM1M1It is the acquisition performance number of main microphon,
PM2M2It is the acquisition performance number of secondary microphone,
PLeoc1And PLeoc2It is the voice signal and the superposition of noise component(s) performance number that main microphon and secondary microphone acquire in real time Value.
The power spectrum that step 63 is calculated is transported in step 64, using following equations to main microphon and pair Microphone carries out noise estimation:
Wherein, GQM1M2It is the noise estimation of main microphon and secondary microphone,
PM1M1It is the acquisition performance number of main microphon,
PM2M2It is the acquisition performance number of secondary microphone,
KM1M1M2M2It is the gain of main microphon or secondary microphone,
Δ S (Z, Y) is main microphon and secondary microphone voice signal and noise power Spectrum ratio.
Also there is adaptive-filtering noise reduction, speech enhan-cement step, specifically used following equation in step 64:
Wherein, T (WB) it is the adaptive-filtering speech enhan-cement function,
PM1M1It is the acquisition performance number of the main microphon,
PM2M2It is the acquisition performance number of the secondary microphone,
GQM1M2It is that the main microphon and secondary microphone noise are estimated,
LM1M1M2M2It is the distance of the main microphon or secondary microphone to signal source,
QSIt is the Adaptive Control Coefficient.
Finally, analog quantity above-mentioned steps 64 exported is amplified by variable amplifier, as shown in figure step 65, is used Following equations:
Wherein AVIt is the variable amplifier amplification factor,
RK2It is the variable resistance 2,
RK1It is the fixed resistance 1.
In above-mentioned noise-reduction method step, the distance between two microphones by above-mentioned noise-reduction method by can be calculated Go out, when the distance is between 10-20mm, noise reduction is good.When the distance is between 10-14mm, it can obtain splendid Noise cancellation effect.
The module packaging pinouts is as shown in Figure 8.Two-microphone array module, power spectrum module, noise eliminate mould Block, variable amplifier output module, memory module and external communication module module are integrated in the PCB modules that a size is M*N In, wherein M=21mm, N=14.1mm greatly reduce system bulk, simple, reliable, are very suitable for being embedded into other electricity In sub- product, it can be widely used in voice collecting noise reduction communication system or device.Module pin is defined as follows:
(1) noise reduction module pin defines 1:OUTL variable amplifier L channels export;
(2) noise reduction module pin defines 2:GND power grounds;
(3) noise reduction module pin defines 3:OUTL variable amplifier right channels export;
(4) noise reduction module pin defines 4:EXT_CLK external clocks input;
(5) noise reduction module pin defines 5:DMIC_OUT digital microphone signal output pins;
(6) noise reduction module pin defines 6:RESET resetting pins;
(7) noise reduction module pin defines 7:SWAP Channel Exchanges control;
(8) noise reduction module pin defines 8:SCL storage chip I2C bus clocks;
(9) noise reduction module pin defines 9:SDA storage chip I2C bus datas;
(10) noise reduction module pin defines 10:INL variable amplifier L channels input;
(11) noise reduction module pin defines 11:GND power grounds;
(12) noise reduction module pin defines 12:INR variable amplifier right channels input;
(13) noise reduction module pin defines 13:VBAT power supplys just, direct current power source voltage range 3.3V-3.6V;
(14) noise reduction module pin defines 14:GND power grounds.
In the module, the spacing t between two microphone AB refers between 10-14MM, tests module signal-to-noise ratio improved values It is as follows:
Signal-to-noise ratio improves situation when 1 t of table is 10.3MM
Signal-to-noise ratio improves situation when 2 t of table is 13.8MM
By table 1-2 as it can be seen that being divided into Three models test apart from difference according to microphone and noise source:
1. close call mode
Strength crosses noise filtering, and microphone array of the distance in 5 to 10 cm ranges effective attenuation noise and can detach language Sound.This pattern is suitble to mobile device application, and for speech source very close to microphone, noise level is quite high;Suitable in 90dB In SPL (acoustic pressure) environmental applications.From 20 to 30dB SNR, (signal-to-noise ratio) improves (SNR-I) to anti-acoustic capability range under this pattern, Performance is also related with the type of noise in chart.
2. short distance pattern
With outstanding decrease of noise functions, voice source position is located slightly away from microphone, within the scope of 50cm to 100cm.This A pattern is suitable for hand free device, and the environment of 70dB SPL (acoustic pressure) is up to suitable for noise level.Drop in such a mode Performance of making an uproar is 10 to 20dB SNR (signal-to-noise ratio) improvement (SNR-I), and performance is also related with the type of noise.
3. remote mode
Within the scope of speech source distance microphone array 2.5m to 5m, slight noise can be eliminated;Suitable for noise level height Up to the environment of 50dB SPL (acoustic pressure).This pattern is suitably to be used for TeleConference Bridge, and the SNR that will provide 7 to 15dB (signal-to-noise ratio) improves (SNR-I), and performance is also related with the type of noise in chart.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality The mode of applying is changed and is changed.Therefore, the utility model is not limited to specific implementation mode disclosed and described above, right Some modifications and changes of the utility model should also be as falling into the protection scope of the claims of the present utility model.In addition, to the greatest extent Some specific terms are used in pipe this specification, these terms are merely for convenience of description, not to the utility model Constitute any restrictions.

Claims (14)

1. a kind of multi-functional bone conduction hearing aid system, which is characterized in that it includes:
Sound collection and transmitting module and sound receive and bone conduction hearing aid module;
The sound collection and transmitting module include the sound receiver for receiving ambient sound and being converted into electric signal, and will The electric signal is sent to the signal emission module of the sound reception and bone conduction hearing aid module, signal emission module and sound Reception device is electrically connected;
The sound receive with bone conduction hearing aid module include may be selected to receive electric signal that the signal emission module is sent or Person's mobile terminal send electric signal signal receiving module, by the Electric signal processing of the reception and generate vibration osteoacusis to The bone conduction hearing aid module of user.
2. multi-functional bone conduction hearing aid system as described in claim 1, it is characterised in that:The sound collection and transmitting mould Block, sound receive separately positioned with bone conduction hearing aid module.
3. multi-functional bone conduction hearing aid system as claimed in claim 2, it is characterised in that:The sound collection and transmitting module It is integrated on a wearable device, the sound, which is received, to be integrated in bone conduction hearing aid module on a bone conduction earphone.
4. multi-functional bone conduction hearing aid system as claimed in any one of claims 1-3, it is characterised in that:The sound receives It is electrically connected between device and signal emission module and is provided with voice de-noising processing module.
5. multi-functional bone conduction hearing aid system as claimed in claim 4, it is characterised in that:The sound receiver and voice Noise reduction process module has small size dual microphone voice collecting noise reduction module, and the module includes two-microphone array module, With main microphon and secondary microphone, main microphon and secondary microphone noise source and speech source are acquired in real time;Power spectrum mould Block, it is folded that the voice signal and noise component(s) performance number acquired in real time to main microphon and secondary microphone is overlapped to obtain performance number It is value added, power spectrum is calculated;Noise cancellation module, for carrying out noise estimation, adaptive filter according to power spectrum Wave, speech enhan-cement, module output, noise reduction process is carried out to voice;Variable amplifier output module has variable amplifier, uses In being amplified output to the analog signal as obtained by the described noise cancellation module processing.
6. multi-functional bone conduction hearing aid system according to claim 5, it is characterised in that:Between two microphones Distance between 10-20mm.
7. multi-functional bone conduction hearing aid system according to claim 6, it is characterised in that:Between two microphones Distance between 10-14mm.
8. the multi-functional bone conduction hearing aid system according to any one of claim 5-7, it is characterised in that:The microphone Array module acquires main Mike and secondary microphone noise source in real time and speech source includes:
The performance number of acquisition major-minor microphone voice signal and noise signal in real time, uses following equations:
PM1M1=tr1(TA1+TO1)
PM2M2=tr2(TA2+TO2)
Wherein, PM1M1It is the acquisition performance number of the main microphon, tr1It is the time parameter that the main microphon acquires in real time, TA1 It is the voice source value of the main microphon acquisition, TO1It is the noise source value of the main microphon acquisition, PM2M2It is the secondary Mike The acquisition performance number of wind, tr2It is the time parameter that the secondary microphone acquires in real time, TA2It is the voice of the secondary microphone acquisition Source value, TO2It is the noise source value of the secondary microphone acquisition;
The voice signal and noise component(s) performance number that main microphon and secondary microphone acquire in real time in the power spectrum module It is overlapped, portals placement location and microphone gain parameter using two microphones of major-minor to be calculated:
PLeoc1=PM1M1*LM1M1M2M2*KM1M1M2M2
PLeoc2=PM2M2*LM1M1M2M2*KM1M1M2M2
Wherein, PLeoc1And PLeoc2It is that voice signal that main microphon and secondary microphone acquire in real time and noise component(s) performance number are folded It is value added, PM1M1It is the acquisition performance number of the main microphon, PM2M2It is the acquisition performance number of the secondary microphone, LM1M1M2M2It is institute Main microphon or secondary microphone are stated to the distance of signal source, KM1M1M2M2It is the gain of the main microphon or secondary microphone;
The voice signal and noise component(s) that main microphon and secondary microphone acquire in real time is calculated in the power spectrum module After power superposition value, the power spectrum is finally calculated:
Wherein, Δ S (Z, Y) is the main microphon and secondary microphone voice signal and noise component(s) power spectrum, PM1M1 are The acquisition performance number of the main microphon, PM2M2 are the acquisition performance numbers of the secondary microphone, and PLeoc1 and PLeoc2 are described The voice signal and noise component(s) performance number superposition value that main microphon and secondary microphone acquire in real time;
The noise cancellation module carries out noise estimation using following equations to main microphon and secondary microphone:
Wherein, GQM1M2It is the noise estimation of the main microphon and secondary microphone, PM1M1It is the acquisition power of the main microphon Value, PM2M2It is the acquisition performance number of the secondary microphone, KM1M1M2M2It is the gain of the main microphon or secondary microphone, Δ S (Z, Y) it is the main microphon and secondary microphone voice signal and noise power Spectrum ratio;
The adaptive-filtering noise reduction of the noise cancellation module, speech enhan-cement use following equation:
Wherein, T (WB) it is the adaptive-filtering speech enhan-cement function, PM1M1It is the acquisition performance number of the main microphon, PM2M2 It is the acquisition performance number of the secondary microphone, GQM1M2It is the main microphon and the estimation of secondary microphone noise, LM1M1M2M2It is described Main microphon or secondary microphone are to the distance of signal source, QSIt is the Adaptive Control Coefficient;
The variable amplifier output module exports analog quantity to noise reduction and amplifies by variable amplifier, uses following equations:
Wherein, AVIt is the variable amplifier amplification factor, RK2It is variable resistance, RK1It is fixed resistance.
9. multi-functional bone conduction hearing aid system as claimed in claim 8, it is characterised in that:The sound reception is helped with osteoacusis It further includes the MIC speaking circuit modules being electrically connected with signal receiving module to listen module.
10. multi-functional bone conduction hearing aid system as claimed in claim 8, it is characterised in that:The bone conduction hearing aid module packet Include osteoacusis drive module and osteoacusis horn module.
11. multi-functional bone conduction hearing aid system as claimed in claim 8, it is characterised in that:The sound collection and transmitting mould Block further includes the first battery module and the first RF radio frequency antenna modules, and the sound receiver further includes with signal emission module Second battery module, the 2nd RF radio frequency antenna modules.
12. multi-functional bone conduction hearing aid system as claimed in claim 11, it is characterised in that:The sound collection and transmitting mould Block further includes being connect to the first charging circuit module of first charging battery module, with the signal emission module telecommunications First key group and the first LED light display module.
13. multi-functional bone conduction hearing aid system as claimed in claim 11, it is characterised in that:The sound receives and osteoacusis Hearing aid module further includes to the second charging circuit module of second charging battery module and the signal receiving module telecommunications The second key group and the second LED light display module of connection.
14. multi-functional bone conduction hearing aid system as described in claim 8, it is characterised in that:The signal emission module is Bluetooth transmission module, the signal receiving module are bluetooth receiving module.
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CN110366086A (en) * 2019-07-18 2019-10-22 河海大学常州校区 Ossiphone auto gain control method based on brain electricity EEG

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CN108206979A (en) * 2017-02-10 2018-06-26 深圳市启元数码科技有限公司 A kind of multi-functional bone conduction hearing aid system and its application method
CN109640212A (en) * 2019-02-20 2019-04-16 广州明医医疗科技有限公司 Tone quality improving method and bone conduction earphone
WO2020252972A1 (en) * 2019-06-20 2020-12-24 潍坊歌尔微电子有限公司 Noise reduction method and device of microphone array of earphone, earphone, and tws earphone

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