CN107155161A - A kind of bone conduction earphone hearing aid control system and control method - Google Patents
A kind of bone conduction earphone hearing aid control system and control method Download PDFInfo
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- CN107155161A CN107155161A CN201710300791.3A CN201710300791A CN107155161A CN 107155161 A CN107155161 A CN 107155161A CN 201710300791 A CN201710300791 A CN 201710300791A CN 107155161 A CN107155161 A CN 107155161A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
- H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
-
- 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
- H04R1/1041—Mechanical or electronic switches, or control elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
- H04R2225/61—Aspects relating to mechanical or electronic switches or control elements, e.g. functioning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/01—Hearing devices using active noise cancellation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/13—Hearing devices using bone conduction transducers
Abstract
The invention belongs to bone conduction earphone technical field, a kind of bone conduction earphone hearing aid control system and control method, including sound pick-up, Bluetooth processor, audio frequency power amplifier, osteoacusis loudspeaker, microcontroller, LAN, mobile terminal are disclosed；Microcontroller passes through LAN and communication of mobile terminal；Pass through sound pick-up, the collective effect of Bluetooth processor and audio frequency power amplifier, by the amplification of external voice, and sound is transferred to the auditory center of people by the skin or bone of osteoacusis horn vibration user, secondary damage will not be caused to the user of dysacousis, during wearer's use, sound is debugged by microprocessor control audio frequency power amplifier, so that sound size meets own situation, wear process easy, and by the cooperation of Bluetooth antenna and Bluetooth processor, Bluetooth music can be achieved and plays.Hearing aid, bluetooth are received calls the invention enables this blue ossiphone, Bluetooth music is played multiple functions and integrated.
Description
Technical field
The invention belongs to bone conduction earphone technical field, more particularly to a kind of bone conduction earphone hearing aid control system and control
Method.
Background technology
By the earphone or audiphone of air transmitted sound, sound passes to cochlea inner ear by outer middle ear, vibrates ear-drum
After cause cochlea auditory nerve experience so that user can hear sound.But there is obstacle for ear and some with conduction
For property hearing loss disease, outer ear disease, the user of middle ear diseases, be not suitable for wearing the earphone by air borne sound
Or audiphone, because such earphone or audiphone need to fill in or be implanted into external auditory meatus, because equidistant relatively near with ear-drum, it is likely to result in
The secondary damage of hearing system.And needing professional to be debugged with special instrument during wearing, debug time is long, wears
Wear inconvenience.
In summary, the problem of prior art is present be：Professional is needed to use during earphone or hearing aid fits
Special instrument is debugged, and debug time is long, wears inconvenience；The acoustical quality that existing hearing aid control system is obtained is poor.
The content of the invention
The problem of existing for prior art, the invention provides a kind of bone conduction earphone hearing aid control system and controlling party
Method.
The present invention is achieved in that a kind of bone conduction earphone hearing aid control system, the bone conduction earphone hearing aid control
System includes sound pick-up, Bluetooth processor, audio frequency power amplifier, osteoacusis loudspeaker, microcontroller；
The sound pick-up is connected with the Bluetooth processor respectively, and external sound is converted to electric signal by the sound pick-up；
The Bluetooth processor is connected with the sound pick-up, the audio frequency power amplifier, microcontroller respectively, for audio signal
Transmission/reception, the AD/DA conversions of audio signal, the modulating/demodulating of encode/decode audio signal and Bluetooth RF data flow, should
Bluetooth processor is controlled by the microcontroller；
The audio frequency power amplifier is connected with the osteoacusis loudspeaker, Bluetooth processor and microcontroller respectively, the audio frequency power amplifier
It is controlled by the microcontroller；
The microcontroller passes through LAN and communication of mobile terminal；
The microcontroller is to frequency-hopping mixing signal time-frequency domain matrixLocated in advance
Reason, specifically includes following two step：
The first step is rightProgress goes low energy to pre-process, i.e., in each sampling instant p,
WillThe value that amplitude is less than thresholding ε is set to 0, and is obtained
Thresholding ε setting can be determined according to the average energy of signal is received；
Second step, finds out the time-frequency numeric field data of p moment (p=0,1,2 ... P-1) non-zero, uses Represent, whereinRepresent the response of p moment time-frequencyCorresponding frequency when non-zero
Rate is indexed, and these non-zeros are normalized and pre-processed, pretreated vectorial b (p, q)=[b is obtained1(p,q),b2(p,
q),…,bM(p,q)]T, wherein
The microcontroller estimates the jumping moment of each jump using clustering algorithm and respectively jumps corresponding normalized mixed
When closing matrix column vector, Hopping frequencies, comprise the following steps：
The first step is right at p (p=0,1,2 ... the P-1) momentThe frequency values of expression are clustered, in obtained cluster
Heart numberThe carrier frequency number that the expression p moment is present,Individual cluster centre then represents the size of carrier frequency, uses respectivelyRepresent；
Second step, to each sampling instant p (p=0,1,2 ... P-1), utilizes clustering algorithm pairClustered,
It is same availableIndividual cluster centre, is usedRepresent；
3rd step, to allAverage and round, obtain the estimation of source signal numberI.e.
4th step, finds outAt the time of, use phRepresent, to the p of each section of continuous valuehIntermediate value is sought, is usedRepresent the l sections of p that are connectedhIntermediate value, thenRepresent the estimation at l-th of frequency hopping moment；
5th step, is obtained according to estimation in second stepAnd the 4th estimate to obtain in step
The frequency hopping moment estimate it is each jump it is correspondingIndividual hybrid matrix column vectorSpecifically formula is：
HereRepresent that l is jumped correspondingIndividual mixing
Matrix column vector estimate；
6th step, estimates the corresponding carrier frequency of each jump, usesRepresent that l is jumped correspondingIndividual frequency estimation, calculation formula is as follows：
The ossiphone also includes noise processor, the noise processor respectively with the sound pick-up and described
Audio frequency power amplifier is connected, and the noise processor is used for the noise reduction process of sound pick-up electric signal.The noise processor is utilized and obtained
Signal the through suppression for involving multipath is carried out to echo-signal, be carried out as follows：
(1) docking collection of letters s (t) carries out nonlinear transformation, carries out as follows：
WhereinA represents the amplitude of signal, and a (m) represents letter
Number symbol, p (t) represent shaping function, fcThe carrier frequency of signal is represented,The phase of signal is represented, by this
Obtained after nonlinear transformation
(2) the multipath space for constructing n signal is：
Wherein,Q is sampling number, and K is maximum delay, by
Maximum detectable range Rmax/ c is obtained, wherein xreci(t) it is reference signal, RmaxFor maximum detectable range, c is the light velocity；
(3) and then using principle of least square method suppress direct wave and its multipath, min will be sought | | Ssur-Xref·α||2Turn
Turn to and askDraw：
Substitute into αestim, solve：
Wherein, SsurFor echo channel signal, α is adaptive weight, αestimFor α estimate,For XrefTransposition,
SotherFor final remaining echo and noise in echo channel；
The signal model that the noise processor receives signal is expressed as：
R (t)=x1(t)+x2(t)+…+xn(t)+v (t),
Wherein, xi(t) it is each component of signal of time-frequency overlapped signal, each component signal is independently uncorrelated, n is time-frequency weight
The number of folded component of signal, θkiRepresent the modulation to each component of signal carrier phase, fciFor carrier frequency, AkiFor i-th of letter
Amplitude number at the k moment, TsiFor Baud Length, pi(t) it is raised cosine shaping filter function that noise reduction coefficient is α, andN (t) is that average is 0, and variance is σ2Stationary white Gaussian noise.
Further, the ossiphone also includes Bluetooth antenna, the Bluetooth antenna and the Bluetooth processor phase
Even.
Further, the Bluetooth antenna is 2.4G antennas.
Further, the ossiphone also includes battery.
Further, the battery is poly-lithium battery.
Further, what is be connected with the microcontroller also includes button group.
Further, the button group is cut including starting up's key, music key, telephone receiving key, hearing aid/bluetooth mode
Change key, volume add-substract key.
Another object of the present invention is to provide a kind of bone conduction earphone hearing aid control method, including：
Microcontroller sets an audio frequency critical value of audio frequency power amplifier；
Judge that a maximum can handle load capacity according to audio frequency critical value；
One first continuous task is combined into according to platform power administrative skill is collected by multiple first tasks；
Judge whether a load capacity of the first continuous task is more than maximum and can handle load capacity；
When the load capacity of the first continuous task, which is more than maximum, to handle load capacity, by the first continuous task
One of overload part the first task remove the first continuous task；
When receiving the first continuous task, microcontroller is switched into an operator scheme by a park mode, with
And the first continuous task of processing；And after the completion of the first continuous task processing, microcontroller is set to dormancy mould
Formula.
Further, the operating frequency of microcontroller has a normal operating frequency under general operation；The osteoacusis ear
Machine aided listens control method also to include：
One first operating frequency is determined according to the load capacity and audio frequency critical value of the first continuous task；
And when microcontroller switches to operator scheme, the operating frequency of microcontroller is lifted by normal operating frequency
The first continuous task is handled to the first operating frequency, and by the first operating frequency；
Wherein the working frequency of the first operating frequency is higher than the working frequency of normal operating frequency.
Further, the bone conduction earphone hearing aid control method also includes：
After the first continuous task processing is completed and CPU enters park mode, according to collecting platform
First task of multiple second tasks and part of overloading is combined into one second continuous work by power management techniques
Task；
When receiving the second continuous task, microcontroller is switched into operator scheme by park mode；
The operating frequency of microcontroller is promoted to one second operating frequency by normal operating frequency, passes through the second operation frequency
Rate handles the second continuous task；And after the completion of the second continuous task processing, microcontroller is set to dormancy mould
Formula；
Wherein the working frequency of the first operating frequency is higher than the working frequency of normal operating frequency；
First continuous task is handled the time point completed using the first operating frequency and starts to receive by microcontroller
To having for one first interval time between the time point of the second continuous task, and normal frequency is used by the first continuous work
Task processing had for one second interval time between completing and receiving the second continuous task, wherein the first interval time is small
In the second interval time.
Advantages of the present invention and good effect are：It need not be worn in duct, at microcontroller, sound pick-up, bluetooth
Device and audio frequency power amplifier, the collective effect of noise processor are managed, is used by the amplification of external voice, and by osteoacusis horn vibration
Sound is transferred to the auditory center of people by the skin or bone of person, will not cause secondary damage to the user of dysacousis,
During wearer's use, sound is debugged by microprocessor control audio frequency power amplifier so that sound size meets itself
Situation, wears process simplicity, and by the cooperation of Bluetooth antenna and Bluetooth processor, Bluetooth music can be achieved and plays so that this
Blue ossiphone receives calls hearing aid, bluetooth, Bluetooth music is played multiple functions and integrated.
The noise processor noise reduction process method of the present invention ensure that the place to go of noise, obtain clearly audio signal.
Brief description of the drawings
Fig. 1 is bone conduction earphone hearing aid control system architecture schematic diagram provided in an embodiment of the present invention；
In figure：11st, sound pick-up；12nd, Bluetooth processor；13rd, audio frequency power amplifier；14th, osteoacusis loudspeaker；15th, microcontroller；
16th, noise processor；17th, Bluetooth antenna；18th, button group；19th, battery；20th, LAN；21st, mobile terminal.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, bone conduction earphone hearing aid control system provided in an embodiment of the present invention includes sound pick-up 11, at bluetooth
Manage device 12, audio frequency power amplifier 13, osteoacusis loudspeaker 14, microcontroller 15, LAN 20, mobile terminal 21.
Microcontroller 15 is communicated by LAN 20 with mobile terminal 21.
The sound pick-up 11 is connected with the Bluetooth processor 12, and external sound is converted to electric signal by the sound pick-up 11；
The Bluetooth processor 12 is connected with the sound pick-up 11, the audio frequency power amplifier 13, the microcontroller 15 respectively,
The Bluetooth processor 12 is used for transmission/reception of audio signal, AD/DA conversions, encode/decode audio signal and the indigo plant of audio signal
The modulating/demodulating of tooth rf data stream, the Bluetooth processor 12 is controlled by the microcontroller 15；
The audio frequency power amplifier 13 is connected with the osteoacusis loudspeaker 14, Bluetooth processor 12 and microcontroller 15 respectively, institute
State audio frequency power amplifier 13 and be controlled by microcontroller 15.
The microcontroller is to frequency-hopping mixing signal time-frequency domain matrixLocated in advance
Reason, specifically includes following two step：
The first step is rightProgress goes low energy to pre-process, i.e., in each sampling instant p,
WillThe value that amplitude is less than thresholding ε is set to 0, and is obtained
Thresholding ε setting can be determined according to the average energy of signal is received；
Second step, finds out the time-frequency numeric field data of p moment (p=0,1,2 ... P-1) non-zero, uses Represent, whereinRepresent the response of p moment time-frequencyCorresponding frequency when non-zero
Rate is indexed, and these non-zeros are normalized and pre-processed, pretreated vectorial b (p, q)=[b is obtained1(p,q),b2(p,
q),…,bM(p,q)]T, wherein
The microcontroller estimates the jumping moment of each jump using clustering algorithm and respectively jumps corresponding normalized mixed
When closing matrix column vector, Hopping frequencies, comprise the following steps：
The first step is right at p (p=0,1,2 ... the P-1) momentThe frequency values of expression are clustered, in obtained cluster
Heart numberThe carrier frequency number that the expression p moment is present,Individual cluster centre then represents the size of carrier frequency, uses respectivelyRepresent；
Second step, to each sampling instant p (p=0,1,2 ... P-1), utilizes clustering algorithm pairClustered,
It is same availableIndividual cluster centre, is usedRepresent；
3rd step, to allAverage and round, obtain the estimation of source signal numberI.e.
4th step, finds outAt the time of, use phRepresent, to the p of each section of continuous valuehIntermediate value is sought, is usedRepresent the l sections of p that are connectedhIntermediate value, thenRepresent the estimation at l-th of frequency hopping moment；
5th step, is obtained according to estimation in second stepAnd the 4th estimate to obtain in step
The frequency hopping moment estimate it is each jump it is correspondingIndividual hybrid matrix column vectorSpecifically formula is：
HereRepresent that l is jumped correspondingIndividual mixing
Matrix column vector estimate；
6th step, estimates the corresponding carrier frequency of each jump, usesRepresent that l is jumped correspondingIndividual frequency estimation, calculation formula is as follows：
The two ends of osteoacusis loudspeaker 14 are held near auricle during the ossiphone that the present invention is provided, use,
Osteoacusis loudspeaker 14 need not be filled in duct, by sound pick-up 11, the collective effect of Bluetooth processor 12 and audio frequency power amplifier 13, will
External voice is conducted to the auditory center of wearer by osteoacusis loudspeaker 14, and the user that have dysacousis will not be caused to listen
The secondary damage of feel system.During wearer's use, audio frequency power amplifier 13 can be controlled by microcontroller 15, according to own situation
Sound calibration debugging is carried out to this ossiphone, process is worn easy.
The ossiphone also include noise processor 16, the noise processor 16 respectively with the sound pick-up 11 and
The audio frequency power amplifier 13 is connected, and the noise processor 16 is used for the noise reduction process of the electric signal of sound pick-up 11.The noise treatment
Device carries out the through suppression for involving multipath to echo-signal using obtained signal, is carried out as follows：
(1) docking collection of letters s (t) carries out nonlinear transformation, carries out as follows：
WhereinA represents the amplitude of signal, and a (m) represents letter
Number symbol, p (t) represent shaping function, fcThe carrier frequency of signal is represented,The phase of signal is represented, by this
Obtained after nonlinear transformation：
(2) the multipath space for constructing n signal is：
Wherein,Q is sampling number, and K is maximum delay, by
Maximum detectable range Rmax/ c is obtained, wherein xreci(t) it is reference signal, RmaxFor maximum detectable range, c is the light velocity；
(3) and then using principle of least square method suppress direct wave and its multipath, min will be sought | | Ssur-Xref·α||2Turn
Turn to and askDraw：
Substitute into αestim, solve：
Wherein, SsurFor echo channel signal, α is adaptive weight, αestimFor α estimate,For XrefTransposition,
SotherFor final remaining echo and noise in echo channel；
The signal model that the noise processor receives signal is expressed as：
R (t)=x1(t)+x2(t)+…+xn(t)+v (t),
Wherein, xi(t) it is each component of signal of time-frequency overlapped signal, each component signal is independently uncorrelated, n is time-frequency weight
The number of folded component of signal, θkiRepresent the modulation to each component of signal carrier phase, fciFor carrier frequency, AkiFor i-th of letter
Amplitude number at the k moment, TsiFor Baud Length, pi(t) it is raised cosine shaping filter function that noise reduction coefficient is α, andN (t) is that average is 0, and variance is σ2Stationary white Gaussian noise.
The present invention provides a kind of bone conduction earphone hearing aid control method, including：
Microcontroller sets an audio frequency critical value of audio frequency power amplifier；
Judge that a maximum can handle load capacity according to audio frequency critical value；
One first continuous task is combined into according to platform power administrative skill is collected by multiple first tasks；
Judge whether a load capacity of the first continuous task is more than maximum and can handle load capacity；
When the load capacity of the first continuous task, which is more than maximum, to handle load capacity, by the first continuous task
One of overload part the first task remove the first continuous task；
When receiving the first continuous task, microcontroller is switched into an operator scheme by a park mode, with
And the first continuous task of processing；And after the completion of the first continuous task processing, microcontroller is set to dormancy mould
Formula.
Further, the operating frequency of microcontroller has a normal operating frequency under general operation；The osteoacusis ear
Machine aided listens control method also to include：
One first operating frequency is determined according to the load capacity and audio frequency critical value of the first continuous task；
And when microcontroller switches to operator scheme, the operating frequency of microcontroller is lifted by normal operating frequency
The first continuous task is handled to the first operating frequency, and by the first operating frequency；
Wherein the working frequency of the first operating frequency is higher than the working frequency of normal operating frequency.
Further, the bone conduction earphone hearing aid control method also includes：
After the first continuous task processing is completed and CPU enters park mode, according to collecting platform
First task of multiple second tasks and part of overloading is combined into one second continuous work by power management techniques
Task；
When receiving the second continuous task, microcontroller is switched into operator scheme by park mode；
The operating frequency of microcontroller is promoted to one second operating frequency by normal operating frequency, passes through the second operation frequency
Rate handles the second continuous task；And after the completion of the second continuous task processing, microcontroller is set to dormancy mould
Formula；
Wherein the working frequency of the first operating frequency is higher than the working frequency of normal operating frequency；
First continuous task is handled the time point completed using the first operating frequency and starts to receive by microcontroller
To having for one first interval time between the time point of the second continuous task, and normal frequency is used by the first continuous work
Task processing had for one second interval time between completing and receiving the second continuous task, wherein the first interval time is small
In the second interval time.
The ossiphone of the present invention is provided with local hearing aid mode, and Bluetooth processor 12 is controlled by microcontroller 15
Local hearing aid mode is switched to, outside sound is converted to electric signal, 16 pairs of electric signals of noise processor by sound pick-up 11
In noise suppressed after be transferred to audio frequency power amplifier 13, audio for put 13 by osteoacusis loudspeaker 14 by sound conduction to using
The auditory center of person, in such a mode, the user for having dysaudia clearly " listening " can arrive the sound of oneself, or carry out
Music is listened, is received calls, the normal user of the sense of hearing can close this pattern.
The ossiphone also includes Bluetooth antenna 17, the Bluetooth antenna 17 and the phase of Bluetooth processor 12
Even.
The ossiphone of the present invention also includes bluetooth mode, passes through Bluetooth antenna 17 and Bluetooth player relevant device
(not shown) connects to code, and Bluetooth antenna 17 receives associate audio signal and is transferred to Bluetooth processor 12, Bluetooth processor 12
Audio signal is handled and sound is transferred to user by osteoacusis loudspeaker 14, in such a mode, user can enter
Row Bluetooth music appreciation.
The Bluetooth antenna 17 can launch the signal of Bluetooth processor 12 to outside as the Primary Component of wireless receiving and dispatching
Receiving terminal, can also receive outside signal so that ossiphone of the invention answers bluetooth telephone, Bluetooth music
The functions such as broadcasting integrate.
The Bluetooth antenna 17 is 2.4G antennas, and versatility is higher.
The ossiphone also includes battery 19.The battery 19 is poly-lithium battery.The battery
19 be rechargeable battery, and endurance is strong.
What is be connected with the microcontroller 15 also includes button group 18.The button group 18 includes starting up's key, music
Play button, telephone receiving key, hearing aid/bluetooth mode switch key, volume add-substract key etc..
User can carry out a variety of operations by button group 18, such as press volume add-substract key and carry out volume regulation, lead to
Cross long-press starting up key and carry out switching on and shutting down operation, press music key and listen to music, press telephone receiving key and carry out phone
Answer and hang up operation etc., it is easy to use.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of bone conduction earphone hearing aid control system, it is characterised in that the bone conduction earphone hearing aid control system includes picking up
Sound device, Bluetooth processor, audio frequency power amplifier, osteoacusis loudspeaker, microcontroller；
The sound pick-up is connected with the Bluetooth processor respectively, and external sound is converted to electric signal by the sound pick-up；
The Bluetooth processor is connected with the sound pick-up, the audio frequency power amplifier, microcontroller respectively, the biography for audio signal
Send/receive, the AD/DA of audio signal conversion, the modulating/demodulating of encode/decode audio signal and Bluetooth RF data flow, the bluetooth
Processor is controlled by the microcontroller；
The audio frequency power amplifier is connected with the osteoacusis loudspeaker, Bluetooth processor and microcontroller respectively, and the audio frequency power amplifier is controlled
In the microcontroller；
The microcontroller passes through LAN and communication of mobile terminal；
The microcontroller is to frequency-hopping mixing signal time-frequency domain matrixPre-processed, had
Body includes following two step：
The first step is rightProgress goes low energy to pre-process, i.e., in each sampling instant p, willThe value that amplitude is less than thresholding ε is set to 0, and is obtained
Thresholding ε setting can be determined according to the average energy of signal is received；
Second step, finds out the time-frequency numeric field data of p moment (p=0,1,2 ... P-1) non-zero, uses
Represent, whereinRepresent the response of p moment time-frequencyCorresponding frequency indices, right when non-zero
The normalization pretreatment of these non-zeros, obtains pretreated vectorial b (p, q)=[b1(p,q),b2(p,q),…,bM(p,
q)]T, wherein
The microcontroller estimates the jumping moment of each jump using clustering algorithm and respectively jumps corresponding normalized mixed moment
When array vector, Hopping frequencies, comprise the following steps：
The first step is right at p (p=0,1,2 ... the P-1) momentThe frequency values of expression are clustered, obtained cluster centre
NumberThe carrier frequency number that the expression p moment is present,Individual cluster centre then represents the size of carrier frequency, uses respectivelyRepresent；
Second step, to each sampling instant p (p=0,1,2 ... P-1), utilizes clustering algorithm pairClustered, equally
It is availableIndividual cluster centre, is usedRepresent；
3rd step, to allAverage and round, obtain the estimation of source signal numberI.e.
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It is corresponding that rate jumping moment estimates each jumpIndividual hybrid matrix column vectorSpecifically formula is：
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<mo>&Sigma;</mo>
<mrow>
<mi>p</mi>
<mo>=</mo>
<mn>1</mn>
<mo>,</mo>
<mi>p</mi>
<mo>&NotEqual;</mo>
<msub>
<mi>p</mi>
<mi>h</mi>
</msub>
</mrow>
<mrow>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
</munderover>
<msubsup>
<mi>b</mi>
<mrow>
<mi>n</mi>
<mo>,</mo>
<mi>p</mi>
</mrow>
<mn>0</mn>
</msubsup>
</mrow>
</mtd>
<mtd>
<mrow>
<mi>l</mi>
<mo>=</mo>
<mn>1</mn>
<mo>,</mo>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<mfrac>
<mn>1</mn>
<mrow>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>-</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mo>&CenterDot;</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>p</mi>
<mo>=</mo>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>-</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
<mo>+</mo>
<mn>1</mn>
<mo>,</mo>
<mi>p</mi>
<mo>&NotEqual;</mo>
<msub>
<mi>p</mi>
<mi>h</mi>
</msub>
</mrow>
<mrow>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</mrow>
</munderover>
<msubsup>
<mi>b</mi>
<mrow>
<mi>n</mi>
<mo>,</mo>
<mi>p</mi>
</mrow>
<mn>0</mn>
</msubsup>
</mrow>
</mtd>
<mtd>
<mrow>
<mi>l</mi>
<mo>></mo>
<mn>1</mn>
<mo>,</mo>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
<mi>n</mi>
<mo>=</mo>
<mn>1</mn>
<mo>,</mo>
<mn>2</mn>
<mo>,</mo>
<mn>...</mn>
<mo>,</mo>
<mover>
<mi>N</mi>
<mo>^</mo>
</mover>
</mrow>
HereRepresent that l is jumped correspondingIndividual hybrid matrix
Column vector estimate；
6th step, estimates the corresponding carrier frequency of each jump, usesRepresent that l is jumped correspondingIt is individual
Frequency estimation, calculation formula is as follows：
<mrow>
<msub>
<mover>
<mi>f</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>c</mi>
<mo>,</mo>
<mi>n</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<mfrac>
<mn>1</mn>
<mrow>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mo>&CenterDot;</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>p</mi>
<mo>=</mo>
<mn>1</mn>
<mo>,</mo>
<mi>p</mi>
<mo>&NotEqual;</mo>
<msub>
<mi>p</mi>
<mi>h</mi>
</msub>
</mrow>
<mrow>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
</munderover>
<msubsup>
<mi>f</mi>
<mi>o</mi>
<mi>n</mi>
</msubsup>
<mrow>
<mo>(</mo>
<mi>p</mi>
<mo>)</mo>
</mrow>
</mrow>
</mtd>
<mtd>
<mrow>
<mi>l</mi>
<mo>=</mo>
<mn>1</mn>
<mo>,</mo>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<mfrac>
<mn>1</mn>
<mrow>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>-</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mo>&CenterDot;</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>p</mi>
<mo>=</mo>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>-</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
<mo>+</mo>
<mn>1</mn>
<mo>,</mo>
<mi>p</mi>
<mo>&NotEqual;</mo>
<msub>
<mi>p</mi>
<mi>h</mi>
</msub>
</mrow>
<mrow>
<msub>
<mover>
<mi>p</mi>
<mo>&OverBar;</mo>
</mover>
<mi>h</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</mrow>
</munderover>
<msubsup>
<mi>f</mi>
<mi>o</mi>
<mi>n</mi>
</msubsup>
<mrow>
<mo>(</mo>
<mi>p</mi>
<mo>)</mo>
</mrow>
</mrow>
</mtd>
<mtd>
<mrow>
<mi>l</mi>
<mo>></mo>
<mn>1</mn>
<mo>,</mo>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
<mi>n</mi>
<mo>=</mo>
<mn>1</mn>
<mo>,</mo>
<mn>2</mn>
<mo>,</mo>
<mn>...</mn>
<mo>,</mo>
<mover>
<mi>N</mi>
<mo>^</mo>
</mover>
<mo>;</mo>
</mrow>
The ossiphone also include noise processor, the noise processor respectively with the sound pick-up and the audio
Power amplifier is connected, and the noise processor is used for the noise reduction process of sound pick-up electric signal；
The noise processor carries out the through suppression for involving multipath to echo-signal using obtained signal, is carried out as follows：
(1) docking collection of letters s (t) carries out nonlinear transformation, carries out as follows：
<mrow>
<mi>f</mi>
<mo>&lsqb;</mo>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>=</mo>
<mfrac>
<mrow>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>*</mo>
<mi>l</mi>
<mi>n</mi>
<mo>|</mo>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>|</mo>
</mrow>
<mrow>
<mo>|</mo>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>|</mo>
</mrow>
</mfrac>
<mo>=</mo>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mi>c</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
WhereinA represents the amplitude of signal, and a (m) represents signal
Symbol, p (t) represents shaping function, fcThe carrier frequency of signal is represented,The phase of signal is represented, passes through the non-thread
Property conversion after obtain：
<mrow>
<mi>f</mi>
<mo>&lsqb;</mo>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>=</mo>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mfrac>
<mrow>
<mi>l</mi>
<mi>n</mi>
<mo>|</mo>
<mi>A</mi>
<mi>a</mi>
<mrow>
<mo>(</mo>
<mi>m</mi>
<mo>)</mo>
</mrow>
<mo>|</mo>
</mrow>
<mrow>
<mo>|</mo>
<mi>A</mi>
<mi>a</mi>
<mrow>
<mo>(</mo>
<mi>m</mi>
<mo>)</mo>
</mrow>
<mo>|</mo>
</mrow>
</mfrac>
<mo>;</mo>
</mrow>
(2) the multipath space for constructing n signal is：
Xref=[Xref1 Xref2 ... Xrefn]；
Wherein,Q is sampling number, and K is maximum delay, by maximum
Detection range Rmax/ c is obtained, wherein xreci(t) it is reference signal, RmaxFor maximum detectable range, c is the light velocity；
(3) and then using principle of least square method suppress direct wave and its multipath, min will be sought | | Ssur-Xref·α||2It is converted into and asksDraw：
Substitute into αestim, solve：
<mrow>
<msub>
<mi>S</mi>
<mrow>
<mi>o</mi>
<mi>t</mi>
<mi>h</mi>
<mi>e</mi>
<mi>r</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>s</mi>
<mrow>
<mi>s</mi>
<mi>u</mi>
<mi>r</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mi>X</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
<msub>
<mi>&alpha;</mi>
<mrow>
<mi>e</mi>
<mi>s</mi>
<mi>t</mi>
<mi>i</mi>
<mi>m</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>S</mi>
<mrow>
<mi>s</mi>
<mi>u</mi>
<mi>r</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>X</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
<msup>
<mrow>
<mo>(</mo>
<msubsup>
<mi>X</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
<mi>H</mi>
</msubsup>
<msub>
<mi>X</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mrow>
<mo>-</mo>
<mn>1</mn>
</mrow>
</msup>
<msub>
<mi>X</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
<msub>
<mi>S</mi>
<mrow>
<mi>s</mi>
<mi>u</mi>
<mi>r</mi>
</mrow>
</msub>
<mo>;</mo>
</mrow>
Wherein, SsurFor echo channel signal, α is adaptive weight, αestimFor α estimate,For XrefTransposition, Sother
For final remaining echo and noise in echo channel；
The signal model that the noise processor receives signal is expressed as：
R (t)=x1(t)+x2(t)+…+xn(t)+v (t),
<mrow>
<msub>
<mi>x</mi>
<mi>i</mi>
</msub>
<mo>=</mo>
<munder>
<mo>&Sigma;</mo>
<mi>k</mi>
</munder>
<msub>
<mi>A</mi>
<mrow>
<mi>k</mi>
<mi>i</mi>
</mrow>
</msub>
<mi>c</mi>
<mi>o</mi>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mn>2</mn>
<msub>
<mi>&pi;f</mi>
<mi>c</mi>
</msub>
<mi>t</mi>
<mo>+</mo>
<msub>
<mi>&theta;</mi>
<mrow>
<mi>k</mi>
<mi>i</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&CenterDot;</mo>
<mi>g</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>kT</mi>
<mrow>
<mi>s</mi>
<mi>i</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
Wherein, xi(t) it is each component of signal of time-frequency overlapped signal, each component signal is independently uncorrelated, n is the overlapping letter of time-frequency
The number of number component, θkiRepresent the modulation to each component of signal carrier phase, fciFor carrier frequency, AkiExist for i-th of signal
The amplitude at k moment, TsiFor Baud Length, pi(t) it is raised cosine shaping filter function that noise reduction coefficient is α, andN (t) is that average is 0, and variance is σ2Stationary white Gaussian noise.
2. bone conduction earphone hearing aid control system as claimed in claim 1, it is characterised in that the ossiphone is also wrapped
Bluetooth antenna is included, the Bluetooth antenna is connected with the Bluetooth processor.
3. bone conduction earphone hearing aid control system as claimed in claim 2, it is characterised in that the Bluetooth antenna is 2.4G days
Line.
4. bone conduction earphone hearing aid control system as claimed in claim 1, it is characterised in that the ossiphone is also wrapped
Include battery.
5. bone conduction earphone hearing aid control system as claimed in claim 4, it is characterised in that the battery is polymer lithium
Battery.
6. bone conduction earphone hearing aid control system as claimed in claim 1, it is characterised in that be connected with the microcontroller
Also include button group.
7. bone conduction earphone hearing aid control system as claimed in claim 6, it is characterised in that the button group is opened including start
Dynamic key, music key, telephone receiving key, hearing aid/bluetooth mode switch key, volume add-substract key.
8. a kind of bone conduction earphone hearing aid control method of the bone conduction earphone hearing aid control system described in utilization claim 1,
Characterized in that, the bone conduction earphone hearing aid control method includes：
Microcontroller sets an audio frequency critical value of audio frequency power amplifier；
Judge that a maximum can handle load capacity according to audio frequency critical value；
One first continuous task is combined into according to platform power administrative skill is collected by multiple first tasks；
Judge whether a load capacity of the first continuous task is more than maximum and can handle load capacity；
When the load capacity of the first continuous task, which is more than maximum, to handle load capacity, by one of first continuous task
First task of overload part removes the first continuous task；
When receiving the first continuous task, microcontroller is switched into an operator scheme, and place by a park mode
Manage the first continuous task；And after the completion of the first continuous task processing, microcontroller is set to park mode.
9. bone conduction earphone hearing aid control method as claimed in claim 8, it is characterised in that the operating frequency of microcontroller exists
There is a normal operating frequency under general operation；The bone conduction earphone hearing aid control method also includes：
One first operating frequency is determined according to the load capacity and audio frequency critical value of the first continuous task；
And when microcontroller switches to operator scheme, the operating frequency of microcontroller is promoted to by normal operating frequency
One operating frequency, and the first continuous task is handled by the first operating frequency；
Wherein the working frequency of the first operating frequency is higher than the working frequency of normal operating frequency.
10. bone conduction earphone hearing aid control method as claimed in claim 8, it is characterised in that the bone conduction earphone hearing aid
Control method also includes：
After the first continuous task processing is completed and CPU enters park mode, according to collecting platform power
First task of multiple second tasks and part of overloading is combined into one second continuous task by administrative skill；
When receiving the second continuous task, microcontroller is switched into operator scheme by park mode；
The operating frequency of microcontroller is promoted to one second operating frequency by normal operating frequency, at the second operating frequency
Manage the second continuous task；And after the completion of the second continuous task processing, microcontroller is set to park mode；
Wherein the working frequency of the first operating frequency is higher than the working frequency of normal operating frequency；
First continuous task is handled the time point completed using the first operating frequency and initially receives the by microcontroller
There is one first interval time between the time point of two continuous tasks, and use normal frequency by the first continuous task
Processing, which is completed and received, had for one second interval time between the second continuous task, wherein the first interval time was less than the
Two interval times.
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| CN109613821A (en) * | 2018-11-23 | 2019-04-12 | 重庆邮电大学 | A kind of FPGA hardware structure based on FxLMS innovatory algorithm in ANC system |
| 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 |
| CN110191406A (en) * | 2019-05-27 | 2019-08-30 | 深圳市中德听力技术有限公司 | A kind of hearing aid with wireless transmission function |
| CN111436016A (en) * | 2019-10-29 | 2020-07-21 | 珠海市杰理科技股份有限公司 | Earphone ear-to-ear debugging method, device and system and wireless earphone |
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Application publication date: 20170912 |