CN108156545A - A kind of array microphone - Google Patents
A kind of array microphone Download PDFInfo
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- CN108156545A CN108156545A CN201810140146.4A CN201810140146A CN108156545A CN 108156545 A CN108156545 A CN 108156545A CN 201810140146 A CN201810140146 A CN 201810140146A CN 108156545 A CN108156545 A CN 108156545A
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Classifications
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The invention discloses a kind of array microphone, including housing, dust-proof acoustically transparent net, acoustic sensor array module and audio circuit module, sound signal collecting that audio circuit module obtains acoustic sensor array module is simultaneously transferred to rear end equipment after being handled；Acoustic sensor array module is with multiple unidirectivity sensors of array way word order；Audio circuit module includes multiple filter network modules, signal processing module and amplification module, the signal that wherein filter network module is polluted for extraction by stationary noise；Filter network module includes Wiener filter；The front and back of housing is provided with penetrable sound hole.The signal that the present invention is polluted using Wiener filter extraction by stationary noise, so as to exclude the interference signal to greatest extent, opens up penetrable sound hole in the front and back of the housing of microphone, further enhances the directive property of microphone array；Multiple unidirectivity sensors of word order expand radio reception range as far as possible, achieve the effect that remote pickup.
Description
Technical field
The present invention relates to art communication systems field more particularly to a kind of array microphones.
Background technology
With the continuous development of society and economy the indoor meeting and exchanging for distance type meeting that are carried out between people are more next
More frequent, microphone is mainly Gooseneck type microphone, and gooseneck type meeting microphone exists it is difficult to ensure that voice range and pickup
The problem of region is narrow, the amplifying effect of conference microphone more demanding to the relative position of participant's moving position and microphone
Bad, poor anti jamming capability, the directive property of microphone is also weaker, so as to affect being normally carried out for meeting.
Invention content
It is an object of the invention to propose a kind of array microphone that can be excluded the interference signal to greatest extent, pass through
The signal polluted using Wiener filter extraction by stationary noise, so as to exclude the interference signal to greatest extent.
Another object of the present invention is to propose a kind of array microphone that can preferably pick up sound, by Mike
The front and back of the housing of wind opens up penetrable sound hole, so as to further enhance the directive property of microphone array.
A further object of the present invention is to propose a kind of array wheat with orientation pickup characteristic and increased pickup range
Gram wind, by by multiple unidirectivity sensors with array way word order so that pickup range is in corridor type directive property；
Radio reception range can be expanded as far as possible in this way, achieve the effect that remote pickup.
Another object of the present invention is to propose a kind of array microphone that can ensure voice range, promotes array microphone
The low frequency response of wind, while inhibit the high frequency response of array microphone, by by multiple unidirectivity sensors in the middle part of array
With interval D1It equally spaced arranges, by multiple unidirectivity sensors at left and right sides of array with interval D2Equally spaced arrange,
Wherein D2More than D1, so as to obtain array microphone of good performance.In order to achieve the above object, the technical side that the present invention uses
Case is：
A kind of array microphone, including housing, dust-proof acoustically transparent net, acoustic sensor array module and audio circuit module, institute
After stating the sound signal collecting that audio circuit module obtains the acoustic sensor array module and being transferred to after being handled
End equipment；
Wherein, the acoustic sensor array module includes multiple unidirectivity sensors, and the multiple unidirectivity
Sensor is with array way word order so that pickup range is in corridor type directive property；
The audio circuit module includes multiple filter network modules, signal processing module and amplification module；It is wherein described
Filter network module includes Wiener filter, for extracting the signal polluted by stationary noise；
The front and back of the housing is provided with penetrable sound hole, and the positive penetrable sound hole and the penetrable sound hole pair at the back side
Claim setting.
Further, the signal processing module includes signal compensation module, signal weighting module and summation module, described
The voice signal of output is transferred to the signal compensation module and the delay estimation module by filter network module respectively, described
Time delayed signal is transferred to signal compensation module by delay estimation module, the voice signal after the signal compensation module for compensating
It is handled by the signal weighting module weighting, treated that voice signal is summed to weighting for the summation module, will ask
Transmission of sound signals with after gives the amplification module.
Further, the signal compensation module includes multiple bridge oscillators.
Further, the interval between the unidirectivity sensor of array both sides, which is more than, is located at singly referring in the middle part of array
Interval between tropism sensor.
Further, the multiple unidirectivity sensor is divided into three groups of arrangements, and every group includes multiple unidirectivities and sense
Device：First group is located in the middle part of array, the left and right sides that second group and third component Wei Yu be first groups, wherein first group multiple
Unidirectivity sensor is with interval D3It equally spaced arranges, multiple unidirectivity sensors of second group and third group are with interval
D2It equally spaced arranges, wherein D2More than D1。
Further, there is interval between first group of unidirectivity sensor and second group of unidirectivity sensor
D3, there are interval Ds between first group of unidirectivity sensor and third group unidirectivity sensor4, and D3And D4It is all higher than D1。
Further, the unidirectivity sensor is condenser type pressure difference electret transducer.
Further, the acoustic sensor array module and the horizontal direction angle of microphone array are 0 °~30 °.
Further, the pickup end of the acoustic sensor array module abuts dust-proof acoustically transparent net.
Further, the dust-proof acoustically transparent net includes outer net and Intranet, and the outer net and Intranet are bonded as one to be formed
Dust-proof acoustically transparent net.
Therefore, the advantageous effect that obtains of the present invention is：
1st, it excludes the interference signal to greatest extent：By using the audio circuit module including Wiener filter, Neng Gouti
The signal polluted by stationary noise is taken, is excluded the interference signal to greatest extent.
2nd, the directive property of microphone array is stronger：Penetrable sound hole is respectively provided with by the housing front and back in microphone, and
Positive penetrable sound hole and the penetrable sound hole at the back side are symmetrical, are configured the penetrable sound hole of symmetry and can preferably pick up voice signal,
Housing can play the role of acoustically transparent in this way, so as to further enhance the directive property of microphone array.
3rd, radio reception range is big：By the way that acoustic sensor array module is set as linear type, can expand as far as possible in this way
Radio reception range so that pickup range is in corridor type directive property, and increases pickup range so that array microphone tool of the invention
There is orientation pickup function, while also achieved the effect that remote pickup.
4th, ensure voice range：The interval of multiple unidirectivity sensors in the middle part of array, which is more than, is located at array or so
Multiple unidirectivity sensors of both sides this ensure that voice range, improve the low frequency response of array microphone, while
The high frequency response of array microphone is inhibited, so as to obtain array microphone of good performance.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a kind of system block diagram of array microphone of one embodiment of the present of invention；
Fig. 2 is a kind of fundamental diagram of the filter network module of array microphone of one embodiment of the present of invention；
Fig. 3 is a kind of fundamental diagram of the signal processing module of array microphone of one embodiment of the present of invention；
Fig. 4 is a kind of essential part circuit of the signal compensation module of array microphone of one embodiment of the present of invention
Figure；
Fig. 5 is a kind of corridor type directive property signal of the sound sensor array of array microphone of one embodiment of the present of invention
Figure；
Fig. 6 is that the monochromatic plane wave in one embodiment of the present of invention projects two dimensional surface schematic diagram on basic matrix；
Fig. 7 is a kind of internal structure schematic diagram of array microphone of one embodiment of the present of invention；
Fig. 8 is a kind of sound-pickup area figure of array microphone of one embodiment of the present of invention；
Fig. 9 is a kind of vertical view of array microphone of one embodiment of the present of invention；
Figure 10 is a kind of oblique view of array microphone of one embodiment of the present of invention.
Wherein, 100 be housing；110 be switch；200 be dust-proof acoustically transparent net；300 be acoustic sensor array module；
400 be audio circuit module；410 be filter network module；411 be Wiener filter；412 be parameter designing mould
Block；420 be signal processing module；421 be signal compensation module；422 it is signal weighting module, 423 is summation module；424 are
Delay estimation module；430 be amplification module 430；440 be power module；450 be mute module.
Specific embodiment
It is described below for the open present invention so that those skilled in the art can realize the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious deformations.It defines in the following description
The present invention basic principle can be applied to other embodiments, deformation scheme, improvement project, equivalent program and do not carry on the back
Other technologies scheme from the spirit and scope of the present invention.
It is understood that term " one " is interpreted as " at least one " or " one or more ", i.e., in one embodiment,
The quantity of one element can be one, and in a further embodiment, the quantity of the element can be multiple, and term " one " is no
It is understood that as the limitation to quantity.
Term used herein is only used for describing the purpose of various embodiments and is not intended to limit.As used herein,
Singulative is intended to also include plural form, makes an exception unless the context clearly dictates.Will further be understood that term " comprising " and/or
" having " when being used in this specification specifies the feature, number, step, operation, component, element or combination to deposit
, and it is not excluded for the presence or additional of one or more of the other feature, number, step, operation, component, element or its group.
Fig. 1 is a kind of system block diagram of array microphone of one embodiment of the present of invention, with reference to Fig. 1, a kind of array wheat
Gram wind, including housing 100, dust-proof acoustically transparent net 200, acoustic sensor array module 300 and audio circuit module 400, the audio
Sound signal collecting that circuit module 400 obtains the acoustic sensor array module 300 and after being transferred to after being handled
End equipment；The acoustic sensor array module 300 includes multiple unidirectivity sensors, and the multiple unidirectivity senses
Device is with array way word order so that pickup range is in corridor type directive property；
Fig. 2 is a kind of fundamental diagram of the filter network module of array microphone of one embodiment of the present of invention；Ginseng
See Fig. 2, the audio circuit module 400 includes filter network module 410 connected in sequence, signal processing module 420, amplification mould
Block 430, power module 440 and mute module 450, the filter network module 410 can be with output multi-channel voice signals, preferably
Ground, the filter network module 410 may include Wiener filter 411 and parameter designing module 412, the parameter designing module
412 are used to adjust the parameter of the Wiener filter 411；The power module 440 is used to power to the amplification module 430,
The mute module 450 is mute state for setting the amplification module 430.
Above-mentioned Wiener filter (wiener filtering) is that one kind is based on minimum mean square error criterion, to steady mistake
The wave filter of the optimal estimation of journey.Mean square error between the output of the voice signal of the wave filter and desired output is minimum,
Available for extracting the signal polluted by stationary noise.
Fig. 3 is a kind of fundamental diagram of the signal processing module of array microphone of one embodiment of the present of invention；Ginseng
See Fig. 3, the signal processing module 420 includes signal compensation module 421 connected in sequence, signal weighting module 422 and summation
The multi-channel sound signal of output is transferred to the signal compensation module 421 by module 423, the filter network module 410, simultaneously
The multi-channel sound signal of output is also transferred to delay estimation module 424, the Delay Estima-tion mould by the filter network module 410
Time delayed signal is transferred to signal compensation module 421 by block 424, and the voice signal after overcompensation passes through the signal weighting module
422 weightings are handled, and then treated that voice signal is summed to weighting for the summation module 423, obtains final sound
This voice signal is finally transmitted further to the amplification module 430 by signal.
Empirical value can be used in the Delay Estima-tion of above-mentioned delay estimation module 424, such as is obtained by experiment test, test wrapper
Border is carried out in whole elimination room.
It may include multiple bridge oscillators per voice signal compensating module 421 all the way, which is RC feedback electricity
One kind of road oscillator, the frequency of use upper limit about in l MHz, can be for example applied in voice range.Fig. 4 is of the invention
A kind of essential part circuit diagram of the signal compensation module of the array microphone of one embodiment；Referring to Fig. 4, bridge oscillators
Essential part is the lead lag circuit of signal phase.In the present embodiment, which can be Wien-bridge oscillator,
Can also be the bridge oscillators that other can generate low frequency signal.
By multiple condenser type pressure difference electret transducers using array way word order as acoustic sensor array module 300,
Fig. 5 is a kind of corridor type directive property schematic diagram of the sound sensor array of array microphone of one embodiment of the present of invention；Referring to
Fig. 5, the small annular in figure are the directive property of each unidirectivity sensor, and the directive property portion of multiple unidirectivity sensors
Divide juxtaposition, external big annular is the directive property of entire array microphone.
Radio reception range can be expanded as far as possible in this way so that pickup range is in corridor type directive property, reaches and picks up at a distance
The effect of sound.
Specifically, the acoustic sensor array module 300 may include multiple unidirectivity sensors, and multiple singly refer to
Tropism sensor is with array way word order so that pickup range is in corridor type directive property；In order to promote the array microphone
Low frequency response, inhibit the high frequency response of array microphone, can also be more preferably so that positioned at the multiple of array both sides
The interval of unidirectivity sensor is more than the interval for the multiple unidirectivity sensors being located in the middle part of array.
The adjacent sound set using Beamforming Method in acoustic sensor array 300 is specifically described below in conjunction with attached drawing
The specific method at the interval of sensor.
Acoustic sensor array module 300 is designed according to Beamforming Method, and so-called Beamforming Method refers to one
Each array element for determining the multispot array of geometry arrangement exports and passes through the method that processing forms space directivity.Beam-former
The signal in some orientation can be filtered off, specified bearing signal is only allowed to pass through, therefore Beam-former can regard space filtering as
Device.
Fig. 6 is that the monochromatic plane wave in one embodiment of the present of invention projects two dimensional surface schematic diagram on basic matrix；Ginseng
See Fig. 6, in the present embodiment, basic matrix is the equidistant linear array being made of N number of sensor, and the neighbor distance of each sensor is d,
The sensitivity that array element each in this way receives is identical.In two dimensional surface, it is assumed that monochromatic plane wave is projected with angle, θ on basic matrix, then
Each delayed output signals are：
x0(t)=Ae-j ω t (1)
x1(t)=Ae-j (ω t+ ψ) (2)
。。。
x(N-1)(t)=Ae-j (ω t+N ψ) (3)
Wherein, A is signal amplitude, and ω is signal angular frequency, and ψ is the phase difference between adjacent array element reception signal.
Wherein, f is the frequency of plane wave, and λ is the wavelength of plane wave, and τ is for time constant, speed of the c for plane wave.
Each road sensor signal is added, the output formula for obtaining battle array is：
It is further simplified, obtained formula is：
If during θ=0 °, i.e., signal is injected along basic matrix normal orientation, corresponding basic matrix output is：
Y (0, t)=N*A (8)
By above formula (7) divided by NA, i.e., amplitude is normalized, the directivity function of the basic matrix can be obtained
For：
When θ=0 °, D (θ)=1 illustrates that each array element is realized with being mutually added at this time, shows polynary battle array output amplitude
Size changes with signal incidence angle.
As long as offset is delayed, it is possible to which beam main lobe is directed toward θ0Direction, wherein θ0Referred to as " guiding orientation ", can obtain
It arrives：
Formula (9) gives the normalization nature directivity function of an equidistant linear array of N members, by the formula it is found that working asWhen obtain maximum value, thus can determine as sin θ=± m λ/d, D (θ,
θ0) maximum value is obtained, wherein as m=0, D (θ, θ0) it is principal maximum, as m=1, D (θ, θ0) big for the first consequent pole of left side
Value；As m=-1, D (θ, θ0) it is the secondary maximum in right side first；
And as sin θ=± m λ/Nd, D (θ, θ0) it is zero.Obviously first consequent pole of the secondary maximum and right side in left side first
There is N-1 zero between big value, λ/Nd is divided between zero.In addition to it is major and minor greatly other than, also several secondary lobes or secondary maximum,
On transverse axis, there is position for sin θ=± (m+1/2) λ/Nd in secondary lobe.In left side first, secondary maximum and the first consequent pole of right side are big
There is N-2 secondary lobe between value.
It is obtained by above description, as d/ λ>When 1/2, it is big that consequent pole occurs in the range of (- 90 °, 90 °) in θ, occur it is secondary greatly
Number is related to the value of d/ λ.In other words, it is ensured that θ a principal maximum only occurs at (- 90 °, 90 °), will not cause orientation mould
It pastes or obscures, need to just ensure d/ λ≤1/2, i.e. d≤λ/2.
Fig. 7 is a kind of internal structure schematic diagram of array microphone of one embodiment of the present of invention；Referring to Fig. 7, this reality
It applies in example, which is chosen as being made of, and with linear type 13 condenser type pressure difference electret transducers
Array way arranges, and wherein the 9 of the middle part of the array condenser type pressure difference electret transducer is with spacing d1Equidistant arrangement, d1
This ensure that only occurring a principal maximum in 17kHz range of sounds, voice range is ensure that with this by≤10mm.At 9
2 condenser type pressure difference electret transducers, wherein d are each provided at left and right sides of condenser type pressure difference electret transducer2It is bigger
In d1,d2Value preferably be 20mm≤d2≤30mm；d3Also slightly larger than d1,d3Value may also preferably be 20mm≤d3≤
30mm；Similarly, d4Value preferably be 20mm≤d4≤ 30mm, d5Value preferably be 20mm≤d5≤30mm；By reality
Test examination finds that this arrangement mode using the present invention is respectively set in the both sides of intermediate 9 condenser type pressure difference electret transducers
Other two condenser type pressure difference electret transducer is put, and the spacing distance between the sensor of two, side is than intermediate 9 biographies
Spacing distance bigger between sensor can effectively promote the low frequency response of the array microphone, also inhibit simultaneously in this way
The high frequency response of array microphone so that the sound performance of array microphone is more preferable.Certainly, acoustic sensor array mould of the invention
Block 300 can also select the condenser type pressure difference electret transducer of other quantity；And the distance between adjacent sensors are not yet
It is limited to the above-mentioned value range listed.
Fig. 8 is a kind of sound-pickup area figure of array microphone of one embodiment of the present of invention；Referring to Fig. 8, the present embodiment
In, acoustic sensor array module 300 and the angle of microphone array horizontal direction are preferably 0 °~30 °, so that sonic transducer
The front (i.e. pickup face) of module is opposite with spokesman position, so that acoustic sensor array module 300 can preferably pick up battle array
The voice signal of row microphone transmission；But in the other embodiment of the present invention, acoustic sensor array module 300 is horizontal with microphone array
The angle in direction can also choose other angles value, however it is not limited to this.
Pickup end abuts dust-proof acoustically transparent net 200 if acoustic sensor array module, so not only can effective reception sound
Sound signal and dustproof effect can be played；Preferably, it is straight to be chosen as 80 mesh for the outer net of the dust-proof acoustically transparent net 200 in the present embodiment
Line stainless (steel) wire, Intranet are chosen as 300 mesh black acrylic fibers nets, and outer net and Intranet are bonded as one to form dust-proof acoustically transparent net, with
Convenient for preferably receiving voice signal and playing dustproof effect；But in other embodiments of the invention, dust-proof acoustically transparent net 200
Other, which can also be chosen, can effectively receive voice signal and can play the material of dustproof effect.
In addition, the housing of microphone has been mainly fixed and connection function, i.e., by dust-proof acoustically transparent net 200, sound sensor array
Row module 300 is fixed and connect with audio circuit module 400.Here profile structure can be used in housing, in order to molding and
It processes, in the present embodiment, the material of housing is chosen as aluminium, but in the other embodiment of the present invention, other materials also can be selected
Section bar with structure is as housing.
Fig. 9 is a kind of vertical view of array microphone of one embodiment of the present of invention；Figure 10 is the reality of the present invention
Apply a kind of oblique view of array microphone of example.Referring to Fig. 9 and Figure 10, in this implementation, the front of housing 100 is provided with switch
110, which can be contact witch, push button switch be may be set to be, for controlling the array microphone
On/off.The top of the front and back of housing 100 is provided with penetrable sound hole, and the penetrable sound hole at positive penetrable sound hole and the back side is substantially
It is symmetrical arranged, voice signal can be picked up, and can enhance the direction of microphone array well by setting the penetrable sound hole of symmetry
Property, such housing 100 can play the role of acoustically transparent；But the penetrable sound hole in the other embodiment of the present invention open up position,
Spread pattern and shape are not limited to the form shown in Fig. 9 and Figure 10, can also be opened up in the other positions of housing 100
Sound hole, and with other spread patterns, one or more shapes setting penetrable sound hole.
In conclusion the present invention, which proposes one kind, has orientation pickup characteristic and increased pickup range, suitable for remote
The array microphone of pickup, the advantageous effect of acquirement are：
1st, it excludes the interference signal to greatest extent：By using the audio circuit module including Wiener filter, Neng Gouti
The signal polluted by stationary noise is taken, is excluded the interference signal to greatest extent.
2nd, the directive property of microphone array is stronger：Penetrable sound hole is respectively provided with by the housing front and back in microphone, and
Positive penetrable sound hole and the penetrable sound hole at the back side are symmetrical, are configured the penetrable sound hole of symmetry and can preferably pick up voice signal,
Housing can play the role of acoustically transparent in this way, so as to further enhance the directive property of microphone array.
3rd, radio reception range is big：By the way that acoustic sensor array module is set as linear type, can expand as far as possible in this way
Radio reception range so that pickup range is in corridor type directive property, and increases pickup range so that array microphone tool of the invention
There is orientation pickup function, while also achieved the effect that remote pickup.
4th, ensure voice range：The interval of multiple unidirectivity sensors in the middle part of array, which is more than, is located at array or so
Multiple unidirectivity sensors of both sides this ensure that voice range, improve the low frequency response of array microphone, while
The high frequency response of array microphone is inhibited, so as to obtain array microphone of good performance.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding changes and deformation, but these corresponding changes and change in accordance with the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (10)
1. a kind of array microphone, including housing (100), dust-proof acoustically transparent net (200), acoustic sensor array module (300) and sound
Frequency circuit module (400), the sound that the audio circuit module (400) obtains the acoustic sensor array module (300) are believed
It number acquires and is transferred to rear end equipment after being handled；
Wherein, the acoustic sensor array module (300) includes multiple unidirectivity sensors, and the multiple unidirectivity
Sensor is with array way word order so that pickup range is in corridor type directive property；
The audio circuit module (400) includes multiple filter network modules (410), signal processing module (420) and amplification mould
Block (430)；Wherein described filter network module (410) includes Wiener filter (411), is polluted for extracting by stationary noise
Signal；
The front and back of the housing (100) is provided with penetrable sound hole, and the positive penetrable sound hole and the penetrable sound hole at the back side
It is symmetrical arranged.
2. a kind of array microphone according to claim 1, which is characterized in that the signal processing module (420) includes
Signal compensation module (421), signal weighting module (422) and summation module (423), the filter network module (410) will be defeated
The voice signal gone out is transferred to the signal compensation module (421) and the delay estimation module (424) respectively, and the delay is estimated
Time delayed signal is transferred to signal compensation module (421) by meter module (424), after the signal compensation module (421) compensates
Voice signal handled by signal weighting module (422) weighting, the summation module (423) is to weighting treated sound
Sound signal is summed, and gives the transmission of sound signals after summation to the amplification module (430).
3. a kind of array microphone according to claim 2, which is characterized in that the signal compensation module (421) includes
Multiple bridge oscillators.
4. a kind of array microphone according to claim 1, which is characterized in that the unidirectivity positioned at array both sides senses
Interval between device is more than the interval between the unidirectivity sensor being located in the middle part of array.
5. a kind of array microphone according to claim 4, which is characterized in that the multiple unidirectivity sensor is divided into
Three groups of arrangements, every group includes multiple unidirectivity sensors：First group is located at array middle part, and second group and third component are not located at
First group of the left and right sides, wherein first group of multiple unidirectivity sensors are with interval D3Equally spaced arrange, second group and
Multiple unidirectivity sensors of third group are with interval D2It equally spaced arranges, wherein D2More than D1。
6. a kind of array microphone according to claim 5, which is characterized in that first group of unidirectivity sensor with
There are interval Ds between second group of unidirectivity sensor3, first group of unidirectivity sensor and third group unidirectivity sensor
Between there are interval Ds4, and D3And D4It is all higher than D1。
7. a kind of array microphone according to claim 1, which is characterized in that the unidirectivity sensor is condenser type
Pressure difference electret transducer.
A kind of 8. array microphone according to claim 1, which is characterized in that the acoustic sensor array module (300)
Horizontal direction angle with microphone array is 0 °~30 °.
A kind of 9. array microphone according to claim 1, which is characterized in that the acoustic sensor array module (300)
Pickup end abut dust-proof acoustically transparent net (200).
10. a kind of array microphone according to claim 1, which is characterized in that the dust-proof acoustically transparent net (200) is including outer
Net and Intranet, the outer net and Intranet are bonded as one to form dust-proof acoustically transparent net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810140146.4A CN108156545B (en) | 2018-02-11 | 2018-02-11 | Array microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810140146.4A CN108156545B (en) | 2018-02-11 | 2018-02-11 | Array microphone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113409811A (en) * | 2021-06-01 | 2021-09-17 | 歌尔股份有限公司 | Sound signal processing method, apparatus and computer readable storage medium |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5793875A (en) * | 1996-04-22 | 1998-08-11 | Cardinal Sound Labs, Inc. | Directional hearing system |
| CN2414574Y (en) * | 2000-02-03 | 2001-01-10 | 程滋颐 | High noise-resistant electret pick-up divice with same directional open of sound inlet hole |
| US20020149070A1 (en) * | 2000-11-28 | 2002-10-17 | Mark Sheplak | MEMS based acoustic array |
| EP1466498A1 (en) * | 2002-01-11 | 2004-10-13 | MH Acoustics, LLC | Audio system based on at least second; order eigenbeams |
| CN1568093A (en) * | 2003-07-08 | 2005-01-19 | 樊大申 | Minitype embeddable sound pickup array microphone and application thereof |
| CN1967658A (en) * | 2005-11-14 | 2007-05-23 | 北京大学科技开发部 | Small scale microphone array speech enhancement system and method |
| CN101277550A (en) * | 2007-03-30 | 2008-10-01 | 美商富迪科技股份有限公司 | Electronic device including internal microphone array |
| CN101292566A (en) * | 2005-11-02 | 2008-10-22 | 雅马哈株式会社 | Audio signal reception device |
| CN101340740A (en) * | 2008-08-08 | 2009-01-07 | 瑞声声学科技(深圳)有限公司 | Uni-directional microphone |
| CN101447190A (en) * | 2008-06-25 | 2009-06-03 | 北京大学深圳研究生院 | Voice enhancement method employing combination of nesting-subarray-based post filtering and spectrum-subtraction |
| US20090141907A1 (en) * | 2007-11-30 | 2009-06-04 | Samsung Electronics Co., Ltd. | Method and apparatus for canceling noise from sound input through microphone |
| CN102440002A (en) * | 2009-04-09 | 2012-05-02 | 挪威科技大学技术转让公司 | Optimal modal beamformer for sensor arrays |
| US20120140947A1 (en) * | 2010-12-01 | 2012-06-07 | Samsung Electronics Co., Ltd | Apparatus and method to localize multiple sound sources |
| CN103004233A (en) * | 2010-07-15 | 2013-03-27 | 摩托罗拉移动有限责任公司 | Electronic apparatus for generating modified wideband audio signals based on two or more wideband microphone signals |
| CN105704636A (en) * | 2014-12-15 | 2016-06-22 | 三星电子株式会社 | acoustic input module and electronic device including the same |
| CN205946167U (en) * | 2016-08-17 | 2017-02-08 | 深圳市芯易邦电子有限公司 | Two directional pickup silicon microphone |
| JP2017083566A (en) * | 2015-10-26 | 2017-05-18 | 日本電信電話株式会社 | Noise suppression device, noise suppression method, and program |
| CN106887236A (en) * | 2015-12-16 | 2017-06-23 | 宁波桑德纳电子科技有限公司 | A kind of remote speech harvester of sound image combined positioning |
| CN107087239A (en) * | 2017-04-05 | 2017-08-22 | 歌尔股份有限公司 | The processing method and processing device of voice signal, microphone |
| CN207835712U (en) * | 2018-02-11 | 2018-09-07 | 北京中电慧声科技有限公司 | A kind of array microphone |
-
2018
- 2018-02-11 CN CN201810140146.4A patent/CN108156545B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5793875A (en) * | 1996-04-22 | 1998-08-11 | Cardinal Sound Labs, Inc. | Directional hearing system |
| CN2414574Y (en) * | 2000-02-03 | 2001-01-10 | 程滋颐 | High noise-resistant electret pick-up divice with same directional open of sound inlet hole |
| US20020149070A1 (en) * | 2000-11-28 | 2002-10-17 | Mark Sheplak | MEMS based acoustic array |
| EP1466498A1 (en) * | 2002-01-11 | 2004-10-13 | MH Acoustics, LLC | Audio system based on at least second; order eigenbeams |
| CN1568093A (en) * | 2003-07-08 | 2005-01-19 | 樊大申 | Minitype embeddable sound pickup array microphone and application thereof |
| CN101292566A (en) * | 2005-11-02 | 2008-10-22 | 雅马哈株式会社 | Audio signal reception device |
| CN1967658A (en) * | 2005-11-14 | 2007-05-23 | 北京大学科技开发部 | Small scale microphone array speech enhancement system and method |
| CN101277550A (en) * | 2007-03-30 | 2008-10-01 | 美商富迪科技股份有限公司 | Electronic device including internal microphone array |
| US20090141907A1 (en) * | 2007-11-30 | 2009-06-04 | Samsung Electronics Co., Ltd. | Method and apparatus for canceling noise from sound input through microphone |
| CN101447190A (en) * | 2008-06-25 | 2009-06-03 | 北京大学深圳研究生院 | Voice enhancement method employing combination of nesting-subarray-based post filtering and spectrum-subtraction |
| CN101340740A (en) * | 2008-08-08 | 2009-01-07 | 瑞声声学科技(深圳)有限公司 | Uni-directional microphone |
| CN102440002A (en) * | 2009-04-09 | 2012-05-02 | 挪威科技大学技术转让公司 | Optimal modal beamformer for sensor arrays |
| CN103004233A (en) * | 2010-07-15 | 2013-03-27 | 摩托罗拉移动有限责任公司 | Electronic apparatus for generating modified wideband audio signals based on two or more wideband microphone signals |
| US20120140947A1 (en) * | 2010-12-01 | 2012-06-07 | Samsung Electronics Co., Ltd | Apparatus and method to localize multiple sound sources |
| CN105704636A (en) * | 2014-12-15 | 2016-06-22 | 三星电子株式会社 | acoustic input module and electronic device including the same |
| JP2017083566A (en) * | 2015-10-26 | 2017-05-18 | 日本電信電話株式会社 | Noise suppression device, noise suppression method, and program |
| CN106887236A (en) * | 2015-12-16 | 2017-06-23 | 宁波桑德纳电子科技有限公司 | A kind of remote speech harvester of sound image combined positioning |
| CN205946167U (en) * | 2016-08-17 | 2017-02-08 | 深圳市芯易邦电子有限公司 | Two directional pickup silicon microphone |
| CN107087239A (en) * | 2017-04-05 | 2017-08-22 | 歌尔股份有限公司 | The processing method and processing device of voice signal, microphone |
| CN207835712U (en) * | 2018-02-11 | 2018-09-07 | 北京中电慧声科技有限公司 | A kind of array microphone |
Non-Patent Citations (3)
| Title |
|---|
| BAHRAM KOUHI-DELEHKARAN: "maximum-likelihood phone-based filter parameter optimization for microphone array speech recognition", 《2008 INTERNATIONAL CONFERENCE ON COMPUTER SCIENCE AND SOFTWARE ENGINEERING》 * |
| 吴波波: "基于穿神器阵列的匀加速运动声源识别与声场可视化研究", 《中国优秀硕士论文全文数据库工程科技II辑》 * |
| 聂欣欣: "麦克风阵列的自适应降噪算法研究", 《中国优秀硕士论文全文数据库信息科技辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113409811A (en) * | 2021-06-01 | 2021-09-17 | 歌尔股份有限公司 | Sound signal processing method, apparatus and computer readable storage medium |
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