CN206894872U - A kind of ultrasonic directional transmissions parametric array of integrated microphone receiving array - Google Patents
A kind of ultrasonic directional transmissions parametric array of integrated microphone receiving array Download PDFInfo
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- CN206894872U CN206894872U CN201720540629.4U CN201720540629U CN206894872U CN 206894872 U CN206894872 U CN 206894872U CN 201720540629 U CN201720540629 U CN 201720540629U CN 206894872 U CN206894872 U CN 206894872U
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Abstract
The utility model discloses a kind of ultrasonic directional transmissions parametric array of integrated microphone receiving array, microphone transducer array, signal processing unit including transceiver, microphone transducer array electrically connects with signal processing unit, microphone transducer array includes several transducers and microphone, and signal processing unit is used for the pretreatment of transmission signal and the analysis of reception signal.The utility model is applied to the portable sets such as mobile phone, protects personal information of the user during equipment use by orienting sounding, and do not influence other people.
Description
Technical field
It the utility model is related to electronic technology field, more particularly to a kind of ultrasound orientation hair of integrated microphone receiving array
Penetrate parametric array.
Background technology
Parametric array is a kind of non-linear sound source, and it can use emission array generation in small-bore low with sharp directive property
Frequency sound wave.Westervelt was in the theoretical model for proposing parametric array first in 1963.Berktay has developed Westervelt's
Study, and the theoretical model of Investigation On Transient Parametric Arrays is proposed in nineteen sixty-five.
Beam synthesis is the pith of parametric array research.In early stage parametric sonar, detectable signal wave beam typically quilt
It is designed as pointing to fixed-direction, wave beam deflection is then completed by mechanical system.Then automatically controlled wave beam deflection is applied to parametric array
Sonar designs, and it effectively reduces the Search/Track time of target.Similar research is also carried out in air dielectric, Tan
Deng proposition using sound phased-array technique realize that automatically controlled wave beam deflects, and its feasibility by simulating, verifying.Then, Shi and Gan
Complete the automatically controlled deflection experiment of parameter array beam.
Speaker Recognition Technology, it is one and is spoken human physiology and the speech parameter of behavioural characteristic according to reflection in voice, from
The technology of dynamic identification speaker's identity.Speaker Identification is based on voice, and the physiological characteristic for both having contained people is anatomically present
Difference, contain the i.e. posteriori customary difference of pronunciation of the behavioural characteristic of people again.
Utility model content
The utility model aims to provide a kind of ultrasonic directional transmissions parametric array of integrated microphone receiving array, suitable for hand
The portable sets such as machine, personal information of the user during equipment use is protected by orienting sounding, and do not influenceed
Other people.
To reach above-mentioned purpose, the utility model is realized using following technical scheme：
The ultrasonic directional transmissions parametric array of integrated microphone receiving array disclosed in the utility model, including transceiver
Microphone transducer array, signal processing unit, the microphone transducer array electrically connect with signal processing unit, microphone
Transducer array includes several transducers and microphone, and the signal processing unit is used for the pretreatment of transmission signal and connect
The analysis of the collection of letters number.
Preferably, the signal processing unit includes：
Audio frequency directional transmitter module, for being modulated and amplifying to signal, it is output on rear class transducer and passes through electroacoustic
Switching emission directional ultrasonic；
Phased drive module, for controlling the unit signal phase of transducer array so that transducer array is listed in this
Body without mechanical deflection in the case of produce acoustic beam deflection.
Preferably, the signal processing unit also includes：
Speaker's locating module, the language from speaker is received by the microphone array in microphone transducer array
Sound, phase analysis and processing are carried out by the signal received to each array element, speaker is positioned.
Further, the signal processing unit also includes：
Speaker Identification module, the model of speaker's phonetic feature and the mould good with precondition are extracted from voice signal
Type storehouse is matched to confirm speaker's identity.
Preferably, the microphone transducer array is linear, rectangle, circle, annular or ellipse.
Preferably, the signal processing unit includes DSP or FPGA.
Preferably, the Speaker Identification module include speaker model storehouse, characteristic extracting module, model training module,
Model identification module and logical decision module, the speaker model storehouse include multiple speaker models.
During speaker detection, the corresponding speaker of its model minimum with tested speech matching distance is taken, as speaking
The result that people differentiates.In speaker verification, with the model of test tone compared with the model of the speaker claimed, if
It is less than a defined threshold values with distance, then the speaker is confirmed, and otherwise, the speaker is not that body that he is claimed
Part.
Preferably, the utility model also includes smart mobile phone, speaker's locating module and/or Speaker Identification module
Included in smart mobile phone.
The beneficial effects of the utility model are：Transducer array and microphone array are integrated together, and reduce space
Take.In addition, being handled using signal processing technology microphone array signals, identify and position user, enable transducer
It is enough that directional sound beams are adaptively sent according to customer location.The utility model can not only protect privacy of user to make other people from dry
Disturb, additionally it is possible to which acoustic beam is adjusted according to customer location in real time so that equipment use is more convenient.
Brief description of the drawings
Fig. 1 shows the ultrasonic directional transducer system of the integrated microphone array applied to mobile phone.
Fig. 2 shows the transducer architecture schematic diagram of integrated microphone array；
Fig. 3 shows the principle for eliminating acoustic feedback；
Fig. 4 shows that voice identifies system；
Fig. 5 shows the basic model of acoustic array signal transacting；
Fig. 6 shows the principle of acoustics the Digital Phased Array technology
Fig. 7 shows that N array element uniform linear arrays realize the structure of the automatically controlled deflection of wave beam.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing, to this reality
It is further elaborated with new.
Fig. 1 show the ultrasonic directional transducer system of integrated microphone receiving array, and transducer array is located at Mobile phone screen
Plane where curtain is simultaneously parallel with it.Signal processing module utilizes the signal transacting hardware platform in mobile phone to ultrasonic directional transducer
Output drive signal simultaneously handles the reception signal of microphone array to identify and position speaker.
Fig. 2 shows integrated microphone and the transducer array structure of ultrasound orientation parametric array.Transducer timesharing receive or
Person launches.The transmitting of single matrix element has certain directive property, and after quadrate array is formed, directive property is strengthened, power
Also increase therewith.And four lapel mikes are placed in by ultrasonic transducer and arranged with even linear array, system entirety institute is greatly reduced
Take up space, while reduce positioning difficulty, improve precision.Because array element is with the effect between array element, secondary lobe can be produced.Therefore, exist
Outside each array element sounding, with the material of one layer of porosity and looseness carry out that shaping is propagated further to piston transducer.
Fig. 3 shows PEM-AFROW (Prediction Error Method based Adaptive Filtering
With Row Operations) algorithm eliminate acoustic feedback principle.Due to microphone array column distance ultrasound directional transducer compared with
Closely, the sounding from transducer can be received unavoidably, influence identification positioning of the microphone to voice.Wherein K is public address gain；q-1
It is delay factor；q-dRepresent the delay of d sample；For feedback compensation signal；It is to offset filtering
Device；F is the signal audio feedback path that (i.e. transducer array) transmits from microphone to loudspeaker.
Filter coefficient vector f (n) on interior of mobile phone impulse response F can use nFThe finite impulse response (FIR) of+1 rank
FIR filter represents：
F (q, n)=fT(n) q=[f0(n)f1(n)…fnF(n)][q0q1…qnF]T
The impulse response coefficient value for estimating to obtain regularly is copied in neutralizing filter in the case where meeting certain condition.
So transaudient signal x (n) is subtracted by the filtered loudspeaker signal of neutralizing filter, and obtained feedback compensation signal d (n) is just
Sound-source signal s (n) should be equal to.Here sound-source signal s (n) is nAThe time-varying autoregressive of rank.It is expressed as below：
Here e (n) is preferable white-noise excitation sequence
Row, b (n)=1.
Transfer function H (q, n) can be write out as follows with IIR iir filter form：
Fig. 4 has gone out voice identification system.The logic diagram of Speaker Recognition System such as figure, including feature extraction, model instruction
Practice, four main modulars of pattern match and logical decision.Characteristic extracting module handles single channel microphone signal, from voice
Speaker's phonetic feature is extracted in signal to establish speaker's phonetic feature model.Model training module refers to establish speaker
The process of model.Speaker model can be single template model, vector quantization model, gauss hybrid models, hidden Ma Erke
Husband's model, artificial nerve network model, SVMs, dynamic bayesian network and their mixed model.No matter what
Model, the parameter Estimation of model and optimization all the step for complete.The test tone feature that Pattern Matching Module will gather in advance
Matched with speaker model, calculate matching distance.During speaker verification, the only speaker model progress with being claimed
Match somebody with somebody；During speaker detection, matched with proprietary model.Logical decision module is sentenced according to the result of calculation of matching distance
Certainly whether speaker is claimed speaker or whom speaker is on earth.
Fig. 5 shows the basic model of acoustic array signal transacting.Because rear utilize divides 2D-MUSIC calculations after identification voice
Method carries out people's acoustic fix ranging, and frequency dividing 2D-MUSIC algorithms are a kind of location algorithms based on Subspace Decomposition, are establishing microphone array
It is different from common MUSIC algorithms during row theoretical model, time factor is introduced, timesharing, and then frequency domain point are carried out in time domain
Frequently, to derive that frequency spectrum and corresponding positional information are influenceed by the coherence of target sound source, stationarity and signal bandwidth with this smaller.
Fig. 6 shows the principle schematic of acoustics the Digital Phased Array technology.So that linear array launches single-frequency original ripple as an example, if
The former ripple that each array element is launchedPropagate to actual transmission array into θ0Have during the virtual plane position of angle
There is same phase, whole array synthesis wave beam can obtain θ0The wave beam deflection of angle.Pass through in acoustics the Digital Phased Array technology
Different first phase φ are loaded to each array element transmission signaliTo meet above-mentioned requirements, and first phase φiThen obtained using signal time-delay method.
Fig. 7 shows that N array element uniform linear arrays realize the structural representation of the automatically controlled deflection of wave beam.The array configuration condition
What adjacent array element was signaled during lower wave beam deflection is first alternate with equivalent difference φ0。φ0By adjacent array element to virtual plane
Vertical range difference determines there is φ0=dsin (θ0)/λ (d is adjacent array element spacing, and λ is transmission signal wavelength).When needing to complete
θoDuring angle waves beam steering, the transmission signal first phase of i-th of array element is (i-1) φ0, and array element i desired signals delay τiMeter
It is as follows to calculate formula：
For a former ripple group, when wave beam deflects, the former ripple belonging to it has identical delay.So former ripple group is applied
Add delay, τiAfterwards, θ will be synchronously completed with each former ripple of groupoThe wave beam deflection of angle.And based on the square transducer array shown in Fig. 2,
According to launch azimuth it is expected, delay needed for each array element is calculated using this method, you can realize that wave beam deflects, reach regulation transmitting sound wave
The purpose in direction.
Certainly, the utility model can also have other various embodiments, without departing substantially from the utility model spirit and its essence
In the case of, those skilled in the art can make various corresponding changes and deformation, but these phases according to the utility model
The change and deformation answered should all belong to the scope of the claims appended by the utility model.
Claims (8)
- A kind of 1. ultrasonic directional transmissions parametric array of integrated microphone receiving array, it is characterised in that the wheat including transceiver Gram wind transducer array, signal processing unit, the microphone transducer array electrically connect with signal processing unit, and microphone changes Energy device array includes several transducers and microphone, and the signal processing unit is used for the pretreatment and reception of transmission signal The analysis of signal.
- 2. the ultrasonic directional transmissions parametric array of integrated microphone receiving array according to claim 1, it is characterised in that institute Stating signal processing unit includes：Audio frequency directional transmitter module, for being modulated and amplifying to signal, it is output on rear class transducer and is changed by electroacoustic Launch directional ultrasonic；Phased drive module, for controlling the unit signal phase of transducer array so that transducer array is listed in nothing itself The deflection of acoustic beam is produced in the case of mechanical deflection.
- 3. the ultrasonic directional transmissions parametric array of integrated microphone receiving array according to claim 2, it is characterised in that institute Stating signal processing unit also includes：Speaker's locating module, the voice from speaker is received by the microphone array in microphone transducer array, led to Cross the signal received to each array element and carry out phase analysis and processing, speaker is positioned.
- 4. the ultrasonic directional transmissions parametric array of the integrated microphone receiving array according to Claims 2 or 3, its feature exist In the signal processing unit also includes：Speaker Identification module, the model of speaker's phonetic feature and the model library good with precondition are extracted from voice signal Matched to confirm speaker's identity.
- 5. the ultrasonic directional transmissions parametric array of integrated microphone receiving array according to claim 1, it is characterised in that institute It is linear, rectangle, circle, annular or ellipse to state microphone transducer array.
- 6. the ultrasonic directional transmissions parametric array of integrated microphone receiving array according to claim 1, it is characterised in that institute Stating signal processing unit includes DSP or FPGA.
- 7. the ultrasonic directional transmissions parametric array of integrated microphone receiving array according to claim 4, it is characterised in that institute Stating speaker's identification module includes speaker model storehouse, characteristic extracting module, model training module, model identification module and logic Decision-making module, the speaker model storehouse include multiple speaker models.
- 8. the ultrasonic directional transmissions parametric array of integrated microphone receiving array according to claim 4, it is characterised in that also Including smart mobile phone, speaker's locating module and/or Speaker Identification module are included in smart mobile phone.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980112A (en) * | 2017-05-09 | 2017-07-25 | 成都泰声科技有限公司 | Sonar array signal processing platform |
| CN112584276A (en) * | 2020-11-03 | 2021-03-30 | 南京浩之德智能科技有限公司 | Parametric array loudspeaker sound distortion frequency domain correction method and system |
| CN117294280A (en) * | 2023-11-24 | 2023-12-26 | 苏州清听声学科技有限公司 | Ultrasonic filter for removing pseudo noise of parametric array loudspeaker |
-
2017
- 2017-05-16 CN CN201720540629.4U patent/CN206894872U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980112A (en) * | 2017-05-09 | 2017-07-25 | 成都泰声科技有限公司 | Sonar array signal processing platform |
| CN112584276A (en) * | 2020-11-03 | 2021-03-30 | 南京浩之德智能科技有限公司 | Parametric array loudspeaker sound distortion frequency domain correction method and system |
| CN117294280A (en) * | 2023-11-24 | 2023-12-26 | 苏州清听声学科技有限公司 | Ultrasonic filter for removing pseudo noise of parametric array loudspeaker |
| CN117294280B (en) * | 2023-11-24 | 2024-02-06 | 苏州清听声学科技有限公司 | Ultrasonic filter for removing pseudo noise of parametric array loudspeaker |
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