CN109640234A - A kind of double bone-conduction microphones and noise removal implementation method - Google Patents

A kind of double bone-conduction microphones and noise removal implementation method Download PDF

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Publication number
CN109640234A
CN109640234A CN201811282789.9A CN201811282789A CN109640234A CN 109640234 A CN109640234 A CN 109640234A CN 201811282789 A CN201811282789 A CN 201811282789A CN 109640234 A CN109640234 A CN 109640234A
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China
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bone
signal
conduction
microphone
shell
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CN201811282789.9A
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孙飞
余志勇
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Shenzhen Yisheng Acoustics Technology Co Ltd
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Shenzhen Yisheng Acoustics Technology Co Ltd
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Priority to CN201811282789.9A priority Critical patent/CN109640234A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00Transducers other than those covered by groups H04R9/00 - H04R21/00
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/10Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083Reduction of ambient noise

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

The present invention provides a kind of double bone-conduction microphones, including shell, microphone assembly includes the first bone-conduction microphone and the second bone-conduction microphone, first bone conduction transducer includes the first flexible glue shell and the first acoustical device, second bone conduction transducer includes the second flexible glue shell and the second acoustical device, first bone-conduction microphone and the second bone conduction transducer are separately mounted on shell and are not in contact with each other, circuit unit includes input interface, modulus conversion chip, digital signal processing chip, analog-digital chip and output interface, input interface is connect with the first bone-conduction microphone and the second bone-conduction microphone respectively by cable, mic1 signal and mic2 signal are converted into digital signal by analog-digital chip, digital signal processing chip carries out noise reduction process to digital signal, signal after noise reduction is converted to analog signal by analog-digital chip, Analog signal is exported by output interface.The present invention can effectively reduce influence of the external noise to call, improve speech quality.

Description

A kind of double bone-conduction microphones and noise removal implementation method
Technical field
The invention belongs to microphone field, it is more particularly to a kind of double bone-conduction microphones and noise removal implementation method.
Background technique
Bone-conduction microphone can be by way of with speaker's skin contact, to pick up through the conduction of the tissues such as bone Speech sound.And external noise can be picked up by two ways by bone-conduction microphone: external noise is directly entered by air transmitted Bone-conduction microphone;External noise enters human body by air transmitted, and enters bone-conduction microphone by human body conduction.
Summary of the invention
The object of the present invention is to provide a kind of reduce, and the external noise of bone-conduction microphone is directly entered by air transmitted The noise removal implementation method of double bone conductions.
According to an aspect of the invention, there is provided a kind of double bone-conduction microphones, including
Shell,
The microphone assembly being set on the shell comprising with the first bone-conduction microphone of direct body contact and not With the second bone-conduction microphone of direct body contact, first bone conduction transducer includes the first flexible glue shell and is located at described The first acoustical device in first flexible glue shell, it includes speech sound that the first acoustical device in first bone-conduction microphone, which receives, The mic1 signal of signal and the noise of air transmitted, second bone conduction transducer include the second flexible glue shell and are located at described The second acoustical device in second flexible glue shell, the second acoustical device in second bone-con-duction microphone receive air transmitted Noise mic2 signal, first bone-conduction microphone and the second bone conduction transducer are not separately mounted on the shell and mutually not Contact,
The circuit unit being set in the shell, including input interface, modulus conversion chip, digital signal processor core Piece, analog-digital chip and output interface, the input interface by cable respectively with first bone-conduction microphone and described Mic1 signal and mic2 signal are converted into digital signal, the number by the connection of the second bone-conduction microphone, the analog-digital chip Word signal processing chip carries out noise reduction process to the digital signal, and signal after noise reduction is converted to mould by the analog-digital chip Quasi- signal, the analog signal are exported by output interface.
In some embodiments, first acoustical device and the second acoustical device are that piezoelectric microphone or condenser type pass Sound device or electromagnetic microphone.
In some embodiments, the shell is equipped with the first card hole, the second card hole and working cavity, first bone conduction First flexible glue shell of sensor is fastened in the first card hole, and the second flexible glue shell of second bone conduction transducer is fastened on In two card holes, the working cavity is connected with first card hole and second card hole respectively, first card hole and institute The same side that the second card hole is located at the working cavity is stated, one end of the shell is equipped with earplug, and the material of the earplug is soft Property material, the other end of the shell is equipped with shoe, and the shoe is the body of rod with radian, when earplug is filled in ear canal: institute It states shoe and the earplug supports first bone conduction transducer and human contact jointly, the shoe and the earplug prop up jointly Support second bone conduction transducer not with human contact.
In some embodiments, the shell is equipped with the first card hole, the second card hole and working cavity, first bone conduction First flexible glue shell of sensor is fastened in the first card hole, and the second flexible glue shell of second bone conduction transducer is fastened on In two card holes, the working cavity is connected with first card hole and second card hole respectively, first card hole and institute The two sides that the second card hole is located at the working cavity are stated, the outside of the shell is equipped with the soft band of annular, when soft band is set in human body Ear, forehead or when neck, first bone-con-duction microphone is fixed on ear, forehead or the throat of human body, described Two bone conduction sensors not with human contact.
In some embodiments, the shell includes flexible glue shell and wears bracket, and the circuit unit is located at described In flexible glue shell, first bone conduction transducer and second bone conduction transducer are located at the two sides of circuit unit.
In some embodiments, the shell is earmuff, first bone-conduction microphone and second Bone conduction sound transmission Device is separately mounted to the inner side and outer side of earmuff, and the circuit unit is installed in earmuff.
According to another aspect of the present invention, a kind of noise removal implementation method of double bone-conduction microphones is provided, including
First bone-conduction microphone receive include speech acoustical signal and air transmitted noise mic1 signal, described the Two bone-con-duction microphones receive the mic2 signal of the noise of air transmitted,
Mic1 signal and mic2 signal are converted into digital signal by the analog-digital chip,
The digital signal processing chip carries out noise reduction process to the digital signal,
Signal after noise reduction is converted to analog signal by the analog-digital chip.
In some embodiments, the digital signal processing chip includes calculating signal amplitude module, voice in the presence of general Rate estimation module, Noise estimation module and speech gain computing module,
The calculating signal amplitude module: calculating separately the energy P2 of energy P1 and the mic2 signal of mic1 signal,
The voice existing probability estimation module: if the comparison of P1 and P2 is greater than a certain range th1, Th1 is 0.8~0.9, Then voice existing probability is 1, if the comparison of P1 and P2 is less than a certain range th2, Th2 is 0.1~0.2, then voice existing probability It is 0, if the comparison of P1 and P2, between th1 and th2, voice existing probability is 0-1,
The Noise estimation module: according to voice existing probability value and P1 and P2, estimate at that time in the energy N1 of noise And N2,
The speech gain computing module: Wiener filtering, spectrum-subtraction or amplitude Power estimation signal-to-noise ratio are utilized, and then calculates language The yield value of sound enhancing, the yield value obtain signal after noise reduction multiplied by mic1 signal.
In some embodiments, the energy P1 and energy P2 is time-domain signal or frequency-region signal.
In some embodiments, the wherein comparison of P1 and P2, can be calculated by the following formula:
P1/P2
(P1-P2)/(P1+P2)
(P1/N1-P2/N2)/(P1/N1+P2/N2)
(P1/N1)/(P2/N2)。
It has the advantage that: the present invention is worn on head, one of bone conduction device and skin using two bone conduction devices Contact, another bone conduction device do not finally play the effect of noise reduction after signal processing with skin contact.Of the invention is double Bone-conduction microphone noise removal implementation method can effectively reduce influence of the external noise to call, improve speech quality.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of double bone-conduction microphones of the embodiment of the present invention one;
Fig. 2 is a kind of wearing schematic of double bone-conduction microphones of the embodiment of the present invention one;
Fig. 3 is a kind of structural schematic diagram of the circuit unit of double bone-conduction microphones of the embodiment of the present invention one;
Fig. 4 is a kind of schematic view of the front view of double bone-conduction microphones of the embodiment of the present invention two;
Fig. 5 is a kind of overlooking structure diagram of double bone-conduction microphones of the embodiment of the present invention two;
Fig. 6 is a kind of wearing schematic of double bone-conduction microphones of the embodiment of the present invention two;
Fig. 7 is a kind of wearing schematic of double bone-conduction microphones of the embodiment of the present invention two;
Fig. 8 is a kind of wearing schematic of double bone-conduction microphones of the embodiment of the present invention two;
Fig. 9 is a kind of wearing schematic of double bone-conduction microphones of the embodiment of the present invention two;
Figure 10 is a kind of wearing schematic of double bone-conduction microphones of the embodiment of the present invention three;
Figure 11 is a kind of wearing schematic of double bone-conduction microphones of the embodiment of the present invention three;
Figure 12 is a kind of wearing schematic of double bone-conduction microphones of the embodiment of the present invention four;
The step of Figure 13 is a kind of noise removal implementation method of double bone-conduction microphones of an embodiment of the present invention signal Figure.
Specific embodiment
The present invention is further illustrated with attached drawing combined with specific embodiments below.
Embodiment one
Fig. 1 and Fig. 2 schematically shows double bone-conduction microphones of one embodiment of the present invention.Such as Fig. 1 and Fig. 2 institute Show, double bone-conduction microphones, including shell 1, microphone assembly 2 and circuit unit 3.
Shell 11 is equipped with the first card hole, the second card hole and working cavity 111.Working cavity 111 respectively with the first card hole and Second card hole is connected.In this embodiment, the first card hole and the second card hole are located at the same side of working cavity.The one of shell 11 End is equipped with earplug 12.The material of earplug 12 is flexible material.Silica gel, foam or other flexible materials can be selected in the material of earplug 12 Matter.In this embodiment, the material of earplug 12 is silica gel.The other end of shell 11 is equipped with shoe 13.Shoe 13 is with radian The body of rod.Microphone assembly 2 includes with the first bone-conduction microphone 21 of direct body contact and not with direct body contact Two bone-conduction microphones 22.First bone-conduction microphone 21 includes for as the first acoustical device 211 of Bone conduction sound transmission and and human body First flexible glue shell 212 of skin contact.First acoustical device 211 is located in the first flexible glue shell 212.First bone-conduction microphone 21 the first acoustical device 211 receives 1 signal of mic of the noise including speech acoustical signal and air transmitted.Second Bone conduction sound transmission Device 22 includes for the second acoustical device 221 as Bone conduction sound transmission and the second flexible glue shell 222 contacted with human skin.The Two acoustical devices 221 are mounted in the second flexible glue shell 222.Second acoustical device 221 of the second bone-con-duction microphone 22 receives The mic2 signal of the noise of air transmitted.First flexible glue shell 212 of the first bone-conduction microphone 21 is fastened on the first of shell 11 In card hole, the second flexible glue shell 222 of the second bone-conduction microphone 22 is fastened in the second card hole of shell 11.First Bone conduction sound transmission Device 21 and the second bone-conduction microphone 22 all have independent acoustic space.First acoustical device 211 and the second acoustical device 221 are Piezoelectric microphone or condenser microphone or electromagnetic microphone.Vertical, the first acoustical device 211 and the second acoustics in the embodiment Device 221 is capacitance type sensor.The first flexible glue 212 and the second flexible glue 222 contacted with human skin can be silica gel or rubber Glue is made, but is not limited to only use silica gel and rubber.First acoustical device 211 and the second acoustical device 221 are typically pacified respectively In the cavity of independent first flexible glue shell 212 and in the cavity of the second flexible glue shell 222.First acoustical device, 211 He Second acoustical device 212 can also connect together two independent flexible glues production, but retain two independent flexible glue cavitys. Hard plastic cement can be used in ear casing 11 and soft plastic cement is made.When earplug 12 is filled in ear canal, shoe 13 and earplug 12 The first bone conduction transducer 21 of common support and human contact, shoe 13 and earplug 12 jointly the second bone conduction transducer 22 of support not with Human contact.Specifically, the first bone-conduction microphone 21 is worn in human antrum auris behind tragus 300.Second Bone conduction sound transmission Device 22 is worn in human body ear ear chamber 300a.First bone-conduction microphone 21 contacts the vibration of human body jawbone to transmit chatter message Number, the second bone-conduction microphone 22 is exposed at the vibration signal that air transmitting is received outside ear.First bone-conduction microphone 21 and second Bone-conduction microphone 22 is all mounted on 11 the inside of ear casing.First bone-conduction microphone 21 is typically worn in human antrum auris in tragus The vibration of human body jawbone is contacted behind 300 to obtain Vocal signal;First bone-conduction microphone 21 also may be mounted at ear canal internal, It is resonated by bone and obtains Vocal signal.Circuit unit 3 is mounted in working cavity.As shown in figure 3, circuit unit 3 includes defeated Incoming interface, modulus conversion chip, digital signal processing chip, analog-digital chip and output interface.Input interface passes through cable It is connect respectively with the first bone-conduction microphone and the second bone-conduction microphone.Analog-digital chip converts mic1 signal and mic2 signal At digital signal.Digital signal processing chip carries out noise reduction process to digital signal.Analog-digital chip turns signal after noise reduction It is changed to analog signal, analog signal is exported by output interface.Output interface is connect or is wirelessly connected by line with communication device, Communication device can be mobile phone, intercom, radio station and the device in relation to voice communication.
A kind of noise removal implementation method of double bone-conduction microphones, comprising: it includes speech sound that the first bone-conduction microphone, which receives, The mic1 signal of signal and the noise of air transmitted, the second bone-con-duction microphone receive the mic2 signal of the noise of air transmitted. Mic1 signal and mic2 signal are converted into digital signal by analog-digital chip.Digital signal processing chip carries out digital signal Noise reduction process.Specifically, digital signal processing chip includes calculating signal amplitude module, voice existing probability estimation module, making an uproar Sound estimation module and speech gain computing module.Wherein, calculate signal amplitude module calculate separately mic1 signal energy P1 and The energy P2 of mic2 signal;Voice existing probability estimation module is for estimating voice existing probability: if the comparison of P1 and P2 is greater than A certain range th1, Th1 are 0.8~0.9, then voice existing probability is 1, if the comparison of P1 and P2 is less than a certain range th2, Th2 It is 0.1~0.2, then voice existing probability is 0, if the comparison of P1 and P2, between th1 and th2, voice existing probability is 0- 1;Noise estimation module is estimated according to voice existing probability value and P1 and P2 at that time in the energy N1 and N2 of noise;Voice increases Beneficial computing module utilizes Wiener filtering, spectrum-subtraction or amplitude Power estimation signal-to-noise ratio, and then calculates the yield value of speech enhan-cement, gain Value obtains signal after noise reduction multiplied by mic1 signal.Energy P1 and energy P2 is time-domain signal or frequency-region signal.Wherein pair of P1 and P2 Than that can be calculated by the following formula: P1/P2;(P1-P2)/(P1+P2);(P1/N1-P2/N2)/(P1/N1+P2/N2); (P1/N1)/(P2/N2).Signal after noise reduction is converted to analog signal by analog-digital chip.
Embodiment two
As shown in Figure 4 and Figure 5, on the basis of example 1, the shape of shell 14 is changed.First card hole and Two card holes are located at the two sides of working cavity.The outside of shell 14 is equipped with soft band 15.When soft band 15 be set in human body ear, When forehead or neck, the first bone-con-duction microphone 21 is fixed on ear, forehead or the throat of human body, the second bone conduction sensor 22 not with human contact.
The following are the wearing schematics of double bone-conduction microphones in the embodiment.As shown in fig. 6, the first bone-conduction microphone 21 It is worn on human body forehead, the first bone-conduction microphone 21 obtains by being fixed on the soft band 15 of annular with the second bone-conduction microphone 22 External vibration signal, the second bone-conduction microphone 22 obtain the Vocal signal of skeleton vibration.As shown in fig. 7, the first bone conduction The vibration of microphone 21 pickup part is outside, and the second bone-conduction microphone 22 vibration pickup part is inside, obtains external vibration respectively The vibration Vocal signal of signal and skeleton.As shown in figure 8, the first bone-conduction microphone 21 and the second bone-conduction microphone 22 pass through It being fixed on the soft band 14 of annular, is worn on the throat position of human body, the first bone-conduction microphone 21 obtains external vibration signal, the Two bone-conduction microphones 22 obtain the Vocal signal of skeleton vibration.The soft band 15 of annular can be used flexible glue and be made, and can also make With the combination of flexible glue and ebonite, but it is not limited to only two kinds of the fixed form.As shown in figure 9, the first bone-conduction microphone 21 shakes Dynamic pickup part is outside, and the second bone-conduction microphone 22 vibration pickup part is inside, obtains external vibration signal and human body respectively The vibration Vocal signal of bone.As shown in Figure 10, the first bone-conduction microphone 21 vibration pickup part is outside, the second bone-conduction microphone 22 vibration pickup parts are inside, obtain the vibration Vocal signal of external vibration signal and skeleton respectively.
Embodiment three
On the basis of example 1, shell is changed.Shell includes flexible glue shell 500 and wears bracket 501, soft Rubber shell body 500 is located in flexible glue shell 500 with the connection of bracket 501, circuit unit 3 is worn, the first bone conduction transducer 21 and second Bone conduction transducer 22 is located at the two sides of circuit unit 3.As is illustrated by figs. 11 and 12, the first bone-conduction microphone 21 and the second bone It leads microphone 22 to be fixed on flexible glue shell 500, flexible glue shell 500, which is fixed on, to be worn on bracket 501.First bone-conduction microphone 21 Bone first is led into microphone 500a and the second bone-conduction microphone 500b wearing by wearing bracket 501 with the second bone-conduction microphone 22 Position is fixed at cheekbone.It is human face at cheekbone, the region in front of ear, the first bone-conduction microphone 500a is obtained External vibration signal is taken, the second bone-conduction microphone 500b obtains the Vocal signal of skeleton vibration.Flexible glue 500 and wear branch Frame 501 can be used flexible glue and be made, and the combination of flexible glue and ebonite also can be used, but be not limited to only two kinds of the fixation side Formula.
Example IV
On the basis of example 1, shell is changed.As shown in figure 12, shell is earmuff 603.First bone conduction passes Sound device 21 and the second bone-conduction microphone 22 are separately mounted to the inner side and outer side of earmuff 603, and circuit unit 3 is installed in earmuff. First bone-conduction microphone 21 is mounted on the inside of earmuff 603, and is close to human facial skin, for obtaining skeleton vibration Vocal signal.Second bone-conduction microphone 22 is mounted on the inside of earmuff 603, for obtaining external vibration signal.Earmuff 603 It is mounted with soft ear pad 602 simultaneously above.Soft ear pad 602, which plays the role of decaying with external voice, is isolated.Bone-conduction microphone 600a may be mounted above earmuff 603, also can change structure type and is mounted on above ear pad 602.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, it is not taking off Under the premise of from the invention design, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.

Claims (10)

1. a kind of double bone-conduction microphones, which is characterized in that including
Shell,
The microphone assembly being set on the shell comprising with the first bone-conduction microphone of direct body contact and not with people The second bone-conduction microphone that body directly contacts, first bone conduction transducer is including the first flexible glue shell and positioned at described first The first acoustical device in flexible glue shell, it includes speech acoustical signal that the first acoustical device in first bone-conduction microphone, which receives, With the mic1 signal of the noise of air transmitted, second bone conduction transducer is including the second flexible glue shell and positioned at described second The second acoustical device in flexible glue shell, the second acoustical device in second bone-con-duction microphone receive making an uproar for air transmitted The mic2 signal of sound, first bone-conduction microphone and the second bone conduction transducer are separately mounted on the shell and do not connect mutually Touching,
The circuit unit being set in the shell, including input interface, modulus conversion chip, digital signal processing chip, number Mould conversion chip and output interface, the input interface by cable respectively with first bone-conduction microphone and second bone Microphone connection is led, mic1 signal and mic2 signal are converted into digital signal, the digital signal by the analog-digital chip It handles chip and noise reduction process is carried out to the digital signal, signal after noise reduction is converted to simulation letter by the analog-digital chip Number, the analog signal is exported by output interface.
2. double bone-conduction microphones according to claim 1, which is characterized in that first acoustical device and the second acoustics device Part is piezoelectric microphone or condenser microphone or electromagnetic microphone.
3. double bone-conduction microphones according to claim 2, which is characterized in that the shell is equipped with the first card hole, the second card First flexible glue shell of hole and working cavity, first bone conduction transducer is fastened in the first card hole, and second bone conduction passes Second flexible glue shell of sensor is fastened in the second card hole, and the working cavity blocks with first card hole and described second respectively Hole is connected, and first card hole and second card hole are located at the same side of the working cavity, and one end of the shell is set There is earplug, the material of the earplug is flexible material, and the other end of the shell is equipped with shoe, and the shoe is with radian The body of rod, when earplug is filled in ear canal: the shoe and the earplug support first bone conduction transducer and human contact jointly, The shoe and the earplug support jointly second bone conduction transducer not with human contact.
4. double bone conduction transducers according to claim 2, which is characterized in that the shell is equipped with the first card hole, the second card First flexible glue shell of hole and working cavity, first bone conduction transducer is fastened in the first card hole, and second bone conduction passes Second flexible glue shell of sensor is fastened in the second card hole, and the working cavity blocks with first card hole and described second respectively Hole is connected, and first card hole and second card hole are located at the two sides of the working cavity, and the outside of the shell is equipped with The soft band of annular, when soft band is set in ear, forehead or the neck of human body, first bone-con-duction microphone is fixed on human body Ear, forehead or throat, second bone conduction sensor not with human contact.
5. double bone conduction transducers according to claim 2, which is characterized in that the shell includes flexible glue shell and wears branch Frame, the circuit unit are located in the flexible glue shell, first bone conduction transducer and second bone conduction transducer difference Positioned at the two sides of circuit unit.
6. double bone conduction transducers according to claim 2, which is characterized in that the shell is earmuff, first bone conduction Microphone and second bone-conduction microphone are separately mounted to the inner side and outer side of earmuff, and the circuit unit is installed on earmuff In.
7. a kind of noise removal implementation method of double bone-conduction microphones as described in claim 1-6, which is characterized in that including
First bone-conduction microphone receives the mic1 signal of the noise including speech acoustical signal and air transmitted, second bone Conduction microphone receives the mic2 signal of the noise of air transmitted,
Mic1 signal and mic2 signal are converted into digital signal by the analog-digital chip,
The digital signal processing chip carries out noise reduction process to the digital signal,
Signal after noise reduction is converted to analog signal by the analog-digital chip.
8. the noise removal implementation method of double bone-conduction microphones according to claim 7, which is characterized in that the number letter Number processing chip includes calculating signal amplitude module, voice existing probability estimation module, Noise estimation module and speech gain meter Module is calculated,
The calculating signal amplitude module: calculating separately the energy P2 of energy P1 and the mic2 signal of mic1 signal,
The voice existing probability estimation module: if the comparison of P1 and P2 is greater than a certain range th1, Th1 is 0.8~0.9, then language Sound existing probability is 1, if the comparison of P1 and P2 is less than a certain range th2, Th2 is 0.1~0.2, then voice existing probability is 0, If the comparison of P1 and P2, between th1 and th2, voice existing probability is 0-1,
The Noise estimation module: according to voice existing probability value and P1 and P2, estimation at that time in the energy N1 of noise and N2,
The speech gain computing module: utilizing Wiener filtering, spectrum-subtraction or amplitude Power estimation signal-to-noise ratio, and then calculates voice and increase Strong yield value, the yield value obtain signal after noise reduction multiplied by mic1 signal.
9. the noise removal implementation method of double bone conductions according to claim 7, which is characterized in that the energy P1 and energy P2 is time-domain signal or frequency-region signal.
10. the noise removal implementation method of double bone conductions according to claim 7, which is characterized in that wherein pair of P1 and P2 Than that can be calculated by the following formula:
P1/P2
(P1-P2)/(P1+P2)
(P1/N1-P2/N2)/(P1/N1+P2/N2)
(P1/N1)/(P2/N2)。
CN201811282789.9A 2018-10-31 2018-10-31 A kind of double bone-conduction microphones and noise removal implementation method Pending CN109640234A (en)

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CN110049395A (en) * 2019-04-25 2019-07-23 维沃移动通信有限公司 Headset control method and ear speaker device
CN110049395B (en) * 2019-04-25 2020-06-05 维沃移动通信有限公司 Earphone control method and earphone device
CN110177315A (en) * 2019-06-04 2019-08-27 北京塞宾科技有限公司 A kind of enhanced antinoise bluetooth headset
CN110177315B (en) * 2019-06-04 2024-02-02 北京塞宾科技有限公司 Enhanced anti-noise Bluetooth headset
CN110225430A (en) * 2019-06-12 2019-09-10 付金龙 A kind of noise reduction osteoacusis headset and its noise-reduction method
CN113947848A (en) * 2021-10-18 2022-01-18 杭州梅清数码科技有限公司 Hospital intelligent self-service terminal and control method thereof
WO2024045739A1 (en) * 2022-08-31 2024-03-07 华为技术有限公司 Sound signal processing device and method, and related device

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Application publication date: 20190416