CN106658296A - Pickup device - Google Patents
Pickup device Download PDFInfo
- Publication number
- CN106658296A CN106658296A CN201710053647.4A CN201710053647A CN106658296A CN 106658296 A CN106658296 A CN 106658296A CN 201710053647 A CN201710053647 A CN 201710053647A CN 106658296 A CN106658296 A CN 106658296A
- Authority
- CN
- China
- Prior art keywords
- phase
- audio signal
- circuit
- outfan
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a pickup device, which relates to the field of pickup technology and can be used for realizing the adjustability of the pickup distance and pickup angle. A microphone component of the pickup device comprises a guide rail and a first microphone and a second microphone which are sequentially arranged along the extension direction of the guide rail, wherein the first microphone is fixedly arranged at one end of the guide rail, and the second microphone is slidably arranged on the guide rail; both the first microphone and the second microphone are connected with the input end of a phase processing total circuit of the pickup device; and the input end of an operation output total circuit of the pickup device is connected with the output end of the phase processing total circuit, and the output end of the operation output total circuit outputs anti-interference audio signals. The pickup device disclosed by the invention can be applied to sound pickup.
Description
Technical field
The present invention relates to pickup technology field, more particularly to a kind of sound pick up equipment.
Background technology
A kind of important means as security protection is monitored, is widely used in each place, such as house of detention, Fire Department, museum
Deng.
At present, video monitoring is popularized very much, but the figure of monitoring site is only have recorded in traditional surveillance video
Picture, does not record the sound at scene, therefore staff can only get the parts of images information at scene, for important sound
Frequency information often cannot be obtained.Give birth to so as to, Voice Surveillance application.Voice Surveillance generally realized using sound pick up equipment, pickup
Device can pick up the sound of monitoring site, therefore staff can get the audio-frequency information at scene by sound pick up equipment,
Simultaneously sound pick up equipment also eliminates the effect of the environment noise in monitoring site so that the audio-frequency information that staff gets
Signal to noise ratio (ratio of signal and noise) is higher, so as to the audio-frequency information for obtaining can be used in the investigation and evidence collection of security protection, also can use
In warning, early warning, remind in user etc..
It is disadvantageous that often moved at any time due to the source of sound in environment, volume change fluctuating is also larger, but generally
Pickup distance and pickup angle are uncontrollable, so as to cause when source of sound movement or volume change, the pickup of sound pick up equipment
Effect is poor.
The content of the invention
To overcome above-mentioned defect of the prior art, the technical problem to be solved to be：To realize pickup distance
With the controllability of pickup angle.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that：
The invention provides a kind of sound pick up equipment, including：The total electricity of microphone assembly, Phase Processing way circuit and computing output
Road；The microphone assembly includes guide rail, and the first mike for setting gradually of the direction extended along the guide rail and the
Two mikes, first mike is packed in one end of the guide rail, and the second microphone is slidably mounted in described
On guide rail, first mike is used for the audio signal of typing first, and the second microphone is used for the audio signal of typing second；
First mike and the second microphone are connected with the input of the Phase Processing way circuit, the Phase Processing
Way circuit is used to detect first audio signal and second audio signal, and according to first audio signal and described
Second audio signal obtains phase contrast, and phase compensation is carried out to second audio signal according to the phase contrast, and output is described
Second audio signal after first audio signal and process；At the input of computing output way circuit and the phase place
The outfan connection of reason way circuit, computing output way circuit be used for process after second audio signal carry out it is anti-phase
Signal processing, and phase reducing is carried out to first audio signal and the signal after inverted signal processing, export anti-interference
Audio signal.
Sound pick up equipment in the present invention can be used for monitoring in, to record monitoring site in sound.In monitoring site, together
The sound of one locus can reach two mikes in microphone assembly by corresponding acoustic space respectively, and by two
Mike difference typing is the first audio signal and the second audio signal, because of the locus difference of two mikes so that same
The sound of one locus reaches the time of corresponding mike and also differs, two audio frequency in two mikes of typing
When signal carries out signal processing, the corresponding sound wave of two audio signals will produce phase contrast；So as to Phase Processing way circuit energy
The first audio signal and the second audio signal are enough detected, and above-mentioned phase place is calculated according to two audio signals for detecting
Difference, then on the basis of the first audio signal, phase compensation is carried out to the second audio signal；The total electricity of computing output in sound pick up equipment
Road can to phase compensation after the second audio signal carry out inversion signal process, and the second audio frequency after inversion signal is processed
Signal and the direct operation amplifier of the first audio signal, finally export single-ended anti-interference audio signal, obtain signal to noise ratio higher
Audio-frequency information.
In microphone assembly in the present invention, second microphone and can be adjusted by slidable adjustment second microphone
The distance between one mike, so as to pickup distance and pickup angle are with the distance between second microphone and the first mike
Change and change, when the distance between the first mike and second microphone become it is big when, pickup distance becomes big, conversely, when the
The distance between one mike and second microphone become hour, and pickup distance diminishes, corresponding, and pickup distance changes, pickup angle
Degree also changes.It can be seen that, the sound pick up equipment of the present invention realizes pickup while the audio signal of high signal to noise ratio is obtained
The controllability of distance and pickup angle.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is the structural representation of the sound pick up equipment in the embodiment of the present invention；
Fig. 2 is the schematic diagram of the space transmission of the audio signal in the embodiment of the present invention；
Fig. 3 is the oscillogram of the first audio signal in the embodiment of the present invention and the second audio signal；
Fig. 4 is the schematic diagram of the Phase Processing way circuit in the embodiment of the present invention；
Fig. 5 is the schematic diagram that the computing in the embodiment of the present invention exports way circuit；
Fig. 6 is the structural representation of the microphone assembly in the embodiment of the present invention.
Reference
10- microphone assemblies；11- guide rails；
111- strip-shaped brackets；112- through holes；
The mikes of 12- first；The mikes of 13- first；
14- first support bars；15- second support bars；
20- Phase Processing way circuits；21- first comparators；
The comparators of 22- second；The triggers of 23- first；
The triggers of 24- second；25- phase difference calculating circuits；
26- phase-shift circuits；30- computings export way circuit；
31- phase inverters；32- difference amplifiers；
33- drivers；40- loudspeaker.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is a part of embodiment of the invention, rather than the embodiment of whole.Based on this
Embodiment in bright, the every other enforcement that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
Embodiment
Referring to Fig. 1, a kind of sound pick up equipment is present embodiments provided, including：Microphone assembly 10, Phase Processing way circuit 20
Way circuit 30 is exported with computing；Microphone assembly 10 includes guide rail 11, and the direction that extended along guide rail 11 sets gradually
First mike 12 and second microphone 13, the first mike 12 is packed in one end of guide rail 11, and second microphone 13 is slidably
Ground is arranged on guide rail 11, and the first mike 12 is used for the audio signal of typing first, and second microphone 13 is used for the sound of typing second
Frequency signal；First mike 12 and second microphone 13 are connected with the input of Phase Processing way circuit 20, and Phase Processing is total
Circuit 20 is used for the first audio signal of detection and the second audio signal, and is obtained according to the first audio signal and the second audio signal
Phase contrast, according to phase contrast phase compensation is carried out to the second audio signal, the second sound after exporting the first audio signal and processing
Frequency signal；The input of computing output way circuit 30 is connected with the outfan of Phase Processing way circuit 20, computing output way circuit
30 be used for process after the second audio signal carry out inversion signal process, and to the first audio signal and inverted signal processing
Signal afterwards carries out phase reducing, exports anti-interference audio signal.
The operation principle of the sound pick up equipment in the present embodiment is：In monitoring site, a sound Jing different propagation paths
The first mike 12 and second microphone 13 are respectively reached, the first mike 12 and second microphone 13 are respectively correspondingly by the sound
Sound typing is the first audio signal and the second audio signal, and Phase Processing way circuit 20 detects respectively the first audio signal and the
Two audio signals, and phase contrast is calculated according to the first audio signal and the second audio signal for detecting, afterwards, with the first sound
On the basis of frequency signal, phase compensation is carried out to the second audio signal, then by the second audio signal and first Jing after phase compensation
Audio signal is exported to computing and exports way circuit 30, and computing output way circuit 30 enters to the second audio signal Jing after phase compensation
The process of row inversion signal, then the second audio signal after the first audio signal and inversion signal process is carried out into calculus of differences, and
Suitably amplified, finally exported single-ended anti-interference audio signal.
From said process as can be seen that sound pick up equipment can export single-ended anti-interference audio signal, so as to eliminate ring
Noise in border, the audio-frequency information higher to obtain signal to noise ratio.
It should be noted that merely just with " sound " by sound externalisation, in order to understand this programme, but and
It is no that specifically sound is defined.
Referring to Fig. 2, based on above-mentioned operation principle, for convenience of description, sound pick up equipment can coordinate with loudspeaker 40, sound Jing loudspeakers
40 enter in sound pick up equipment, therefore the space transmission of audio signal may include loudspeaker 40, acoustic space and mike, and monitoring is existing
Sound in is entered from loudspeaker 40, and Jing acoustics space arrives separately at the first mike 12 and second microphone 13, it is assumed that first
The distance between mike 12 and second microphone 13 are d, the side that the direction and guide rail 11 that sound is propagated along loudspeaker 40 is extended
Angle between is θ, then it can be calculated that the sound sent from loudspeaker 40 reaches the distance of the first mike 12 and from loudspeaker
The difference of the distance that 40 sound for sending reach second microphone 13 is d*cos θ, and d*cos θ can also be embodied in acoustic signals
In the time difference of (namely audio signal) transmission, the basic reason that phase contrast is produced is can also be.And in the present embodiment, wheat
Gram wind component 10 includes two mikes on guide rail 11 and guide rail 11, and second microphone 13 can be slided on guide rail 11
It is dynamic, so as to the size apart from d can be changed by slip second microphone 13, and then realize to pickup distance and pickup angle
Adjustment, that is, realize the adjustment to pickup focus and pickup scope.
In sum, the distance between two mikes in the microphone assembly 10 of the sound pick up equipment in the present embodiment can
Adjust, accordingly, calculated phase contrast is adjustable in Phase Processing way circuit 20, so that sound pick up equipment can
The source of sound of various movements or the fluctuating of volume are adapted to, and then suitable for various environment.
Of course, loudspeaker 40 and sound pick up equipment here can be the parts in monitoring system.
Microphone assembly 10 in the present embodiment includes two mikes, has also reached the effect of speech enhan-cement.
In prior art, also have by realize using 4～8 mikes and using array algorithm adjust pickup distance and
Pickup angle, but the number of channels of this method is more, treating capacity big, and rear end needs special digital signal processor
(Digital Signal Processor, abbreviation DSP) or central processing unit (Central Processing Unit, referred to as
CPU it is relatively costly) carrying out algorithm configuration.And in this programme, device used is less, and operation is simple and reliable.
In prior art, also realize pickup adjustable angle using acoustics cavity design, but this project plan comparison according to
Rely in cavity design, in general there is integrated complex, orientation pickup limited angle.And the sound pick up equipment ratio in this programme
It is easier to realize, simple structure, and the pickup angular range for adjusting is larger.
Preferably, Phase Processing way circuit 20 can be realized using the method for analog circuitry processes, to reach apparatus structure
The purpose of simple and reliable operation.
Exemplary, Phase Processing way circuit 20 may include phase-detection electronic circuit and phase compensation electronic circuit；First wheat
Gram wind 12 and second microphone 13 are connected with the input of phase-detection electronic circuit, and phase-detection electronic circuit is used for detection first
Audio signal and the second audio signal, and phase contrast is obtained according to the first audio signal and the second audio signal；Phase compensation
The input of circuit is connected with the outfan of phase-detection electronic circuit, and phase compensation electronic circuit is used for according to phase contrast to the second sound
Frequency signal carries out phase compensation, the second audio signal after exporting the first audio signal and processing.
Exemplary, computing output way circuit 30 may include that signal inversion electronic circuit, differential amplification electronic circuit and output are driven
Mover circuit；The input of signal inversion electronic circuit is connected with the outfan of Phase Processing way circuit 20, signal inversion electronic circuit
Inversion signal process is carried out for the second audio signal after to process；The input of differential amplification electronic circuit and signal inversion
The outfan connection of circuit, differential amplification electronic circuit is used to carry out the signal after the first audio signal and inverted signal processing
Phase reducing；The input of output driving electronic circuit is connected with the outfan of differential amplification electronic circuit, and output driving electronic circuit is used
In the anti-interference audio signal of output.
Further, the anti-interference audio signal is relatively strong audio signal resistant to common code interference.
Referring to Fig. 3, in the course of work of sound pick up equipment, As time goes on, the first audio signal and the second audio frequency
Under the state change of signal is：
State a：In phase-detection electronic circuit, the first audio signal and the second audio signal two-way sound wave are detected；
State b：In phase compensation electronic circuit, on the basis of the first audio signal, line phase is entered to the second audio signal
Compensation.
State c：In signal inversion electronic circuit, inversion signal process is carried out to the second audio signal；
State d：In differential amplification electronic circuit, calculus of differences is carried out to the first audio signal and the second audio signal, and
It is appropriate to amplify.
Referring to Fig. 4, it is preferred that phase-detection electronic circuit may include that first comparator 21, the second comparator 22, first are triggered
Device 23, the second trigger 24 and phase difference calculating circuit 25, phase compensation electronic circuit includes phase-shift circuit 26.First comparator 21
Input be connected with the first mike 12, the outfan of first comparator 21 is connected with the input of the first trigger 23；The
The input of two comparators 22 is connected with second microphone 13, the input of the outfan of the second comparator 22 and the second trigger 24
End connection；The outfan of the outfan of the first trigger 23 and the second trigger 24 with the input of phase difference calculating circuit 25
Connection, the input of phase-shift circuit 26 is connected with the outfan of phase difference calculating circuit 25, outfan and the fortune of phase-shift circuit 26
Calculate the input connection of output way circuit 30；Specifically, the outfan of phase-shift circuit 26 may include the first outfan and second defeated
The input for going out end, the first outfan and the equal computing output way circuit 30 of the second outfan connects, wherein, the first outfan is used for
Export the first audio signal, the second audio signal that the second outfan is used for after output process.
In this scheme, first comparator 21 is used to judging in the first mike 12 that the first audio frequency of whether typing to be believed
Number, containing the trigger electric current supporting with first comparator 21 in the first trigger 23, the first trigger 23 is used to being formed and the
Corresponding first impulse waveform of one audio signal.Likewise, the second comparator 22 is used to judge whether recorded in second microphone 13
The second audio signal is entered, the trigger electric current supporting with the second comparator 22, the second trigger has been contained in the second trigger 24
24 are used to form the second impulse waveform corresponding with the second audio signal.Phase difference calculating circuit 25 is used for according to the first impulse wave
Shape and the second impulse waveform are calculated phase contrast, and output a control signal to phase compensating network, and phase compensating network is adopted
Realizing, phase-shift circuit 26 is controlled by phase difference calculating circuit 25 to phase-shift circuit 26, and phase-shift circuit 26 is used to believe the second audio frequency
Number phase shift process is carried out, and export the second audio signal after phase shift and the first audio signal.
Referring to Fig. 5, signal inversion electronic circuit includes phase inverter 31, the input of phase inverter 31 and the second of phase-shift circuit 26
Outfan connects；Differential amplification electronic circuit includes difference amplifier 32, the in-phase input end of difference amplifier 32 and the first output
End connection, the inverting input of difference amplifier 32 is connected with the outfan of phase inverter 31；Output driving electronic circuit includes driving
Device 33, the input of driver 33 is connected with the outfan of difference amplifier 32, and the outfan of driver 33 is used to export anti-dry
Disturb audio signal.
In this scheme, phase inverter 31 is the phase inverter 31 of the second audio signal, and phase inverter 31 is used to realize the second sound
The signal inversion of frequency signal.Difference amplifier 32 be used for realize the first audio signal and the phase reducing of the second audio signal, with
Reduce common-mode signal and interference.Driver 33 is used to carry out Current amplifier, is output as single-ended audio signal, single-ended audio frequency letter
Number for realizing long range propagation and further improve capacity of resisting disturbance.
Referring to Fig. 6, in the present embodiment, the structure of guide rail 11 can be various, and exemplary, guide rail 11 may include strip
Frame 111, is provided with the through hole 112 parallel with strip-shaped bracket 111 in strip-shaped bracket 111, the two ends of through hole 112 respectively with strip
The two ends correspondence of support 111 is close to, and the first mike 12 fixes the corresponding end for being installed on through hole 112, and second microphone 13 can be slided
It is installed on dynamicly in through hole 112.In this scheme, to form embedded guide rail 11, mike can be embedded in design through hole 112
In through hole 112.
With continued reference to Fig. 6, further, microphone assembly 10 also includes first support bar 14 and second support bar 15, the
One support bar 14 is packed in the corresponding end of through hole 112, and the first mike 12 is packed on guide rail 11 by first support bar 14, the
Two support bars 15 are slidably installed in through hole 112, and second microphone 13 is arranged on guide rail 11 by second support bar 15.
In this scheme, strip-shaped bracket 111 is designed with thereon the supporting construction of mike as the supporting construction of guide rail 11, meets
Mike affects little requirement to sound-wave path.
It is noted that the diversity of the first mike 12 and second microphone 13 is less, the pickup effect of sound pick up equipment
Fruit is better, therefore, the first mike 12 and second microphone 13 may be selected same type mike, to ensure the consistent of height
Property.
In the present embodiment, it is notable that in order to improve the directivity of pickup effect, the first mike 12 and second
Mike 13 can select directional microphone, and moreover, the distance between two mikes d becomes big, and Phase Processing is always electric
Also there is corresponding change in the calculated phase contrast in road 20, in Phase Processing way circuit 20 and computing output way circuit 30
After some process are carried out to audio signal, directivity is strengthened；Conversely, the distance between two mikes d diminishes, directivity is got over
It is weak.It can be seen that, the directivity pickup effect of the indicator device in the present embodiment is good, has both been embodied in the directivity of mike itself
On the basis of, cause directivity that significantly conversion occurs further through the spacing for adjusting two mikes, further lift directivity and pick up
The performance of sound, from the structure of front end to follow-up processing of circuit, from multiple technologies angle the enhancing of directivity is ensured.
Further, the sound in general range can be received in order to ensure sound pick up equipment, can be made between two mikes
Distance can reach certain value, in conjunction with practical situation, it is preferred that between the first mike 12 and second microphone 13
Ultimate range can be 40cm.Corresponding, the length of guide rail 11 can be within 40cm.
Further, interference is formed in order to prevent, and the phenomenons such as the mutual crosstalk of sound wave occurs, between two mikes
Beeline should be greater than or equal to 5cm.
Sound pick up equipment in order to improve the present embodiment, can pass through to adjust the phase shifting parameter and difference in phase-shift circuit 26
The amplification exported in amplifier 32 is strengthening pickup effect.
Comprehensive above content, the sound pick up equipment in the present embodiment forms certain arrangement and refers to by two directional microphones
To, in actual applications, the first mike 12 can be arranged on the front end of guide rail 11, second microphone 13 is arranged on into guide rail 11
Behind, then by processing of circuit, phase adjusted and direct operation amplifier are carried out to two mike pickup contents, finally obtain
Jamproof output.
Sound pick up equipment in the present embodiment can be applicable in monitoring system, and wherein sound pick up equipment is headend equipment, that is,
It is arranged in monitoring phenomenon, it is indoor in monitoring, rear end equipment is additionally provided with, it is convenient with the information that receiving front-end equipment is obtained
Observation.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (10)
1. a kind of sound pick up equipment, it is characterised in that include：Microphone assembly, Phase Processing way circuit and computing output way circuit；
The microphone assembly includes guide rail, and the first mike for setting gradually of the direction extended along the guide rail and the
Two mikes, first mike is packed in one end of the guide rail, and the second microphone is slidably mounted in described
On guide rail, first mike is used for the audio signal of typing first, and the second microphone is used for the audio signal of typing second；
First mike and the second microphone are connected with the input of the Phase Processing way circuit, the phase place
Processing way circuit is used to detect first audio signal and second audio signal, and according to first audio signal and
Second audio signal obtains phase contrast, and phase compensation is carried out to second audio signal according to the phase contrast, output
Second audio signal after first audio signal and process；
The input of the computing output way circuit is connected with the outfan of the Phase Processing way circuit, and the computing output is total
Second audio signal after circuit is used for process carries out inversion signal process, and anti-to first audio signal and Jing
Signal after phase signals process carries out phase reducing, exports anti-interference audio signal.
2. sound pick up equipment according to claim 1, it is characterised in that the Phase Processing way circuit includes phase-detection
Circuit and phase compensation electronic circuit；
First mike and the second microphone are connected with the input of the phase-detection electronic circuit, the phase place
Detection electronic circuit is used to detect first audio signal and second audio signal, and according to first audio signal and
Second audio signal obtains phase contrast；
The input of the phase compensation electronic circuit is connected with the outfan of the phase-detection electronic circuit, phase compensation
Circuit is used to carry out second audio signal phase compensation according to the phase contrast, exports first audio signal and place
Second audio signal after reason.
3. sound pick up equipment according to claim 2, it is characterised in that the phase-detection electronic circuit compares including first
Device, the second comparator, the first trigger, the second trigger and phase difference calculating circuit；
The input of the first comparator is connected with first mike, the outfan of the first comparator and described
The input connection of one trigger；The input of second comparator is connected with the second microphone, and described second compares
The outfan of device is connected with the input of second trigger；The outfan of first trigger and second trigger
Outfan be connected with the input of the phase difference calculating circuit；
The phase compensation electronic circuit includes phase-shift circuit, the input of the phase-shift circuit and the phase difference calculating circuit
Outfan connects, and first outfan and the second outfan of the phase-shift circuit export the input of way circuit with the computing
Connection；Wherein, first outfan is used to export first audio signal, and second outfan is used for after output process
Second audio signal.
4. sound pick up equipment according to claim 3, it is characterised in that the computing output way circuit includes signal inversion
Circuit, differential amplification electronic circuit and output driving electronic circuit；
The input of the signal inversion electronic circuit is connected with the outfan of the Phase Processing way circuit, signal inversion
Second audio signal after circuit is used for process carries out inversion signal process；
The input of the differential amplification electronic circuit is connected with the outfan of the signal inversion electronic circuit, differential amplification
Circuit is used to carry out phase reducing to first audio signal and the signal after inverted signal processing；
The input of the output driving electronic circuit is connected with the outfan of the differential amplification electronic circuit, output driving
Circuit is used to export anti-interference audio signal.
5. sound pick up equipment according to claim 4, it is characterised in that the signal inversion electronic circuit includes phase inverter, institute
State the input of phase inverter to be connected with the second outfan of the phase-shift circuit；
The differential amplification electronic circuit includes difference amplifier, the in-phase input end of the difference amplifier and the described first output
End connection, the inverting input of the difference amplifier is connected with the outfan of the phase inverter；
The output driving electronic circuit includes driver, and the input of the driver connects with the outfan of the difference amplifier
Connect, the outfan of the driver is used to export anti-interference audio signal.
6. the sound pick up equipment according to any one of Claims 1 to 5, it is characterised in that the guide rail includes strip-shaped bracket, institute
State and the through hole parallel with the strip-shaped bracket be provided with strip-shaped bracket, the two ends of the through hole respectively with the strip-shaped bracket
Two ends correspondence be close to, first mike fixes the corresponding end for being installed on the through hole, and the second microphone is slidably
Be installed in the through hole.
7. sound pick up equipment according to claim 6, it is characterised in that the microphone assembly also include first support bar and
Second support bar, the first support bar is packed in the corresponding end of the through hole, and first mike passes through described first
Strut is packed on the guide rail, and the second support bar is slidably installed in the through hole, and the second microphone leads to
Cross the second support bar to be arranged on the guide rail.
8. the sound pick up equipment according to any one of Claims 1 to 5, it is characterised in that first mike and described
Two mikes are directional microphone.
9. the sound pick up equipment according to any one of Claims 1 to 5, it is characterised in that first mike and described
Ultimate range between two mikes is 40cm.
10. the sound pick up equipment according to any one of Claims 1 to 5, it is characterised in that first mike and described
Minimum range between two mikes is 5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710053647.4A CN106658296A (en) | 2017-01-22 | 2017-01-22 | Pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710053647.4A CN106658296A (en) | 2017-01-22 | 2017-01-22 | Pickup device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106658296A true CN106658296A (en) | 2017-05-10 |
Family
ID=58841166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710053647.4A Pending CN106658296A (en) | 2017-01-22 | 2017-01-22 | Pickup device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106658296A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020113696A1 (en) * | 2018-12-07 | 2020-06-11 | 歌尔股份有限公司 | Combined sensor |
| 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 |
| CN114255556A (en) * | 2021-11-30 | 2022-03-29 | 歌尔科技有限公司 | Intelligent security control method, intelligent security equipment and controller |
| CN114401473A (en) * | 2021-12-29 | 2022-04-26 | 东莞市瑞勤电子有限公司 | Connecting circuit, audio acquisition system and voice communication equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5185803A (en) * | 1991-12-23 | 1993-02-09 | Ford Motor Company | Communication system for passenger vehicle |
| US6272229B1 (en) * | 1999-08-03 | 2001-08-07 | Topholm & Westermann Aps | Hearing aid with adaptive matching of microphones |
| CN101697603A (en) * | 2009-03-02 | 2010-04-21 | 北京牡丹视源电子有限责任公司 | Method and device for measuring phase difference between left channel and right channel |
| CN102595295A (en) * | 2012-03-06 | 2012-07-18 | 歌尔声学股份有限公司 | Micro-electro-mechanical-system (MEMS) microphone |
| CN103716742A (en) * | 2013-12-02 | 2014-04-09 | 吴东亮 | Microphone array for conference room |
| CN104010251A (en) * | 2013-02-27 | 2014-08-27 | 晨星半导体股份有限公司 | Radio system and related method |
| CN104899000A (en) * | 2014-03-03 | 2015-09-09 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN105510713A (en) * | 2014-09-26 | 2016-04-20 | 中微半导体设备(上海)有限公司 | Phase comparator and phase difference monitoring device |
| CN206149487U (en) * | 2017-01-22 | 2017-05-03 | 北京快鱼电子股份公司 | Sound pick up equipment |
-
2017
- 2017-01-22 CN CN201710053647.4A patent/CN106658296A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5185803A (en) * | 1991-12-23 | 1993-02-09 | Ford Motor Company | Communication system for passenger vehicle |
| US6272229B1 (en) * | 1999-08-03 | 2001-08-07 | Topholm & Westermann Aps | Hearing aid with adaptive matching of microphones |
| CN101697603A (en) * | 2009-03-02 | 2010-04-21 | 北京牡丹视源电子有限责任公司 | Method and device for measuring phase difference between left channel and right channel |
| CN102595295A (en) * | 2012-03-06 | 2012-07-18 | 歌尔声学股份有限公司 | Micro-electro-mechanical-system (MEMS) microphone |
| CN104010251A (en) * | 2013-02-27 | 2014-08-27 | 晨星半导体股份有限公司 | Radio system and related method |
| CN103716742A (en) * | 2013-12-02 | 2014-04-09 | 吴东亮 | Microphone array for conference room |
| CN104899000A (en) * | 2014-03-03 | 2015-09-09 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN105510713A (en) * | 2014-09-26 | 2016-04-20 | 中微半导体设备(上海)有限公司 | Phase comparator and phase difference monitoring device |
| CN206149487U (en) * | 2017-01-22 | 2017-05-03 | 北京快鱼电子股份公司 | Sound pick up equipment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020113696A1 (en) * | 2018-12-07 | 2020-06-11 | 歌尔股份有限公司 | Combined sensor |
| 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 |
| CN113409811B (en) * | 2021-06-01 | 2023-01-20 | 歌尔股份有限公司 | Sound signal processing method, apparatus and computer readable storage medium |
| CN114255556A (en) * | 2021-11-30 | 2022-03-29 | 歌尔科技有限公司 | Intelligent security control method, intelligent security equipment and controller |
| CN114401473A (en) * | 2021-12-29 | 2022-04-26 | 东莞市瑞勤电子有限公司 | Connecting circuit, audio acquisition system and voice communication equipment |
| CN114401473B (en) * | 2021-12-29 | 2024-05-03 | 东莞市瑞勤电子有限公司 | Connection circuit, audio acquisition system and voice communication equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106658296A (en) | Pickup device | |
| CN104519212B (en) | A kind of method and device for eliminating echo | |
| CN101438259B (en) | Method and apparatus for accommodating device and/or signal mismatch in sensor array | |
| EP1940195B1 (en) | Sound outputting apparatus, sound outputting method, sound output processing program and sound outputting system | |
| CN103475980B (en) | A kind of self adaptation acoustic feedback removing method | |
| EP2677765B1 (en) | Headphone for active noise suppression | |
| TR199800475T1 (en) | A system for adaptive filtering of audio signals in order to increase the intelligibility of speech in noisy environmental conditions. | |
| CN102469402B (en) | audio system | |
| CN101621730A (en) | Apparatus and method for detecting acoustic feedback | |
| CN102197422A (en) | Audio source proximity estimation using sensor array for noise reduction | |
| CN101656908A (en) | Method for controlling sound focusing, communication device and communication system | |
| CN105679329A (en) | Microphone array voice enhancing device adaptable to strong background noise | |
| CN206149487U (en) | Sound pick up equipment | |
| CN102177731B (en) | Acoustic apparatus | |
| CN110322892B (en) | Voice pickup system and method based on microphone array | |
| US20180262175A1 (en) | Auto-equalization, in-room low-frequency sound power optimization | |
| JP2950934B2 (en) | Microphone device | |
| CN108847250A (en) | A kind of orientation noise-reduction method, system and earphone | |
| CN112270915A (en) | Active noise reduction method for indoor space | |
| JP4909058B2 (en) | Noise reduction device | |
| CN206024053U (en) | Active noise reduction In-Ear Headphones | |
| CN106034272A (en) | Loudspeaker compensation system and portable mobile terminal | |
| CN103813241B (en) | Mobile electronic device and audio playing apparatus thereof | |
| CN211742643U (en) | Vehicle-mounted noise reduction control device | |
| JP3194872B2 (en) | Microphone device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |
|
| RJ01 | Rejection of invention patent application after publication |