CN109275084A

CN109275084A - Test method, device, system, equipment and the storage medium of microphone array

Info

Publication number: CN109275084A
Application number: CN201811063803.6A
Authority: CN
Inventors: 刘孟美; 许凡; 蒋佳为; 张伟
Original assignee: Beijing Xiaomi Intelligent Technology Co Ltd
Current assignee: Beijing Xiaomi Intelligent Technology Co Ltd
Priority date: 2018-09-12
Filing date: 2018-09-12
Publication date: 2019-01-25
Anticipated expiration: 2038-09-12
Also published as: CN109275084B

Abstract

The disclosure provides test method, device, system, equipment and the storage medium of a kind of microphone array, and method therein includes: the audio signal for receiving and obtaining after microphone array is acquired testing audio；The audio signal is handled, the single channel for obtaining each microphone specifies the interchannel between parameter and microphone to specify parameter；Parameter and the specified parameter of the interchannel is specified to determine the performance of microphone array, and output performance test result according to the single channel；Wherein, it includes: sensitivity level, sensitivity level curve, total harmonic distortion parameter, total harmonic distortion curve, noise level, signal-to-noise ratio, the tolerance of frequency response, leakproofness parameter and cut ridge parameter that the single channel, which specifies parameter,；It includes: frequency response parameter of consistency, time delay parameter of consistency and relevance parameter that the interchannel, which specifies parameter,.Thus the disclosure improves the accuracy of the performance test results, and reduces the difficulty of the performance test to microphone array.

Description

Test method, device, system, equipment and the storage medium of microphone array

Technical field

This disclosure relates to pick up facility the field of test technology more particularly to the test method of microphone array, device, be System, equipment and storage medium.

Background technique

Microphone array by certain amount acoustic sensor (microphone) according to it is certain it is regularly arranged formed, for pair The spatial character of sound field is sampled and is handled, and is widely used in artificial intelligence, such as smart television, intelligent air condition, machine The different application scenarios such as device people.

However, microphone array need to make and adaptively adjust due to the diversification of application scenarios, microphone array is such as adjusted The mounting means of column, the cavity of microphone, sealing material, and/or sealing means；To cause the pickup performance of microphone array It is irregular, it will affect subsequent applications, for example, hindering subsequent algorithm research, adaptation, tuning, that is, product commercialization；Shadow The performance of the corn modules such as sound front-end processing, voice wake-up, speech recognition.

Therefore, it before microphone array dispatches from the factory or applies, is typically necessary and its performance is tested.But the relevant technologies In, the performance of single microphone is only tested, and using the performance test results summation of each microphone as the performance of microphone array Test result.The relevant technologies do not make reasonable performance test to entire microphone array as a result, ignore each microphone it Between influence of the relationship to entire array, cause the performance test results more unilateral and inaccurate, even if performance test is qualified, But still subsequent applications may be will affect.

Summary of the invention

To overcome the problems in correlation technique, present disclose provides the test method of microphone array, device, be System, equipment and storage medium.

According to the first aspect of the embodiments of the present disclosure, a kind of test method of microphone array is provided, which comprises

Receive the audio signal obtained after microphone array is acquired testing audio；

The audio signal is handled, the channel between the specified parameter of single channel of each microphone and microphone is obtained Between specify parameter；

It specifies parameter and the interchannel that parameter is specified to determine the performance of microphone array according to the single channel, and exports The performance test results；

Wherein, it includes: sensitivity level that the single channel, which specifies parameter, sensitivity level curve, total harmonic distortion parameter, total humorous Wave distortion curve, noise level, signal-to-noise ratio, the tolerance of frequency response, leakproofness parameter and cut ridge parameter；The specified ginseng of the interchannel Number includes: frequency response parameter of consistency, time delay parameter of consistency and relevance parameter.

According to the second aspect of an embodiment of the present disclosure, a kind of test device of microphone array is provided, comprising:

Receiving module is configured as: receiving the audio signal obtained after microphone array is acquired testing audio；

Processing module is configured as: being handled the audio signal, the single channel for obtaining each microphone specifies parameter Interchannel between microphone specifies parameter；

Output module is configured as: specifying parameter and the interchannel that parameter is specified to determine Mike according to the single channel The performance of wind array, and output performance test result；

According to the third aspect of an embodiment of the present disclosure, a kind of test macro of microphone array is provided, including audiogenic device, Loudspeaker and calculating equipment；The audio frequency play interface of the audiogenic device and the audio receiving interface signal of loudspeaker connect；Institute The audio input interface for stating calculating equipment is connect with the audio output interface signal of microphone array to be measured, and the calculating equipment Including aforementioned device；

Test before microphone array to be measured, the pronunciation end of the pickup end of microphone array to be measured and loudspeaker it is opposite and The center at pickup end and the pronunciation center of loudspeaker are on same level straight line.

According to a fourth aspect of embodiments of the present disclosure, a kind of electronic equipment is provided, comprising:

Processor；

Memory, for storing the computer program that can be executed by the processor；

Wherein, the step of realizing preceding method when the processor executes described program.

According to a fifth aspect of the embodiments of the present disclosure, a kind of computer readable storage medium is provided, calculating is stored thereon with Machine program, when described program is executed by processor the step of realization preceding method.

The technical scheme provided by this disclosed embodiment can include the following benefits as a result:

By the multiple exploration and practice made the creative labor early period, determination has the performance evaluation of microphone array The multiple parameters of important meaning；To realize during the test, the multiple parameters according to determined by early period, and obtain each wheat The single channel of gram wind specifies the interchannel between parameter and microphone to specify parameter, subsequent based on the specified ginseng of resulting single channel It is that can determine the performance of microphone array to be measured that several and interchannel, which specifies parameter, is conducive to improve the accurate of the performance test results Property, and reduce the difficulty of the performance test to microphone array.

It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not The disclosure can be limited.

Detailed description of the invention

Fig. 1 is the schematic diagram of the application scenarios of embodiment of the disclosure；

Fig. 2 is a kind of disclosure flow chart of the test method of microphone array shown according to an exemplary embodiment；

Fig. 3 is a kind of disclosure schematic diagram of testing audio shown according to an exemplary embodiment；

Fig. 4 be the disclosure it is shown according to an exemplary embodiment it is a kind of for test microphone array performance using soft The schematic diagram of the man-machine interface of part；

Fig. 5 is the configuration audio popped up after disclosure browse controls G shown according to an exemplary embodiment is clicked The interface schematic diagram of file application interface；

Fig. 6 is a kind of disclosure structural frames of the test device of microphone array shown according to an exemplary embodiment Figure；

Fig. 7 is a kind of disclosure structural frames of the test device of microphone array shown according to an exemplary embodiment Figure；

Fig. 8 is a kind of disclosure electronic equipment of the test device of microphone array shown according to an exemplary embodiment Structural block diagram.

Specific embodiment

Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended The example of the consistent device and method of some aspects be described in detail in claims, the disclosure.

It is only to be not intended to be limiting the disclosure merely for for the purpose of describing particular embodiments in the term that the disclosure uses. The "an" of the singular used in disclosure and the accompanying claims book, " described " and "the" are also intended to including majority Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps It may be combined containing one or more associated any or all of project listed.

It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the disclosure A little information should not necessarily be limited by these terms.These terms are only used to for same type of information being distinguished from each other out.For example, not departing from In the case where disclosure range, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ... When " or " in response to determination ".

Embodiment of the disclosure proposes a kind of test method of new microphone array, by paying creative labor early period Dynamic multiple exploration and practice, it is determined that the multiple parameters being of great significance to the performance evaluation of microphone array；To real Now during the test, the multiple parameters according to determined by early period, and the single channel for obtaining each microphone specifies parameter and wheat Interchannel between gram wind specifies parameter, specifies parameter can be true between parameters and channels in subsequent specify based on resulting single channel The performance of fixed microphone array to be measured is conducive to the accuracy for improving the performance test results, and reduces the property to microphone array The difficulty that can be tested.

A kind of schematic diagram of application scenarios of the embodiment of the present disclosure is as shown in Figure 1, audiogenic device plays survey by loudspeaker S Audition frequency；The testing audio received is converted into audio signal by microphone array M to be measured, and is transferred to calculating equipment；It calculates Equipment analyzes the audio signal and obtains multiple performance evaluation parameters, with the property of the determination microphone array to be measured Energy.Wherein, the audiogenic device and the calculating equipment can be same equipment, for example, computer equipment can be used as source of sound Equipment and the summation for calculating equipment are also responsible for that is, computer equipment is not only responsible for playing testing audio to the audio signal Analysis processing.

Hereinafter, briefly explaining the forming process of aforementioned applications scene:

Microphone array to be measured and power are met the requirements by bracket and are distorted small loudspeaker and is placed in satisfaction test It is required that free field environment in, such as anechoic room.Wherein, the test request met needed for environment includes: that ambient pressure is in standard Atmospheric pressure and environment temperature are normal temperature.The distance between microphone array and loudspeaker to be measured for being placed can be one meter, Distance between the two can also be changed according to actually required.Positional relationship between microphone array and loudspeaker to be measured is also It needs to meet: the pickup end of the microphone array to be measured and pronunciation end of loudspeaker is opposite and the center at pickup end and the hair of loudspeaker Sound center is on same level straight line, to guarantee that the sound hole face direction of each microphone in microphone array to be measured is raised Sound device.In addition, the pickup end of microphone array to be measured needs to exceed the bracket for supporting it preferably to improve test accuracy, That is, support panel of the pickup end compared to bracket, protrudes toward loudspeaker direction, to prevent the acoustic impacts after bracket reflects from waiting for Survey the performance test of microphone array.

Before the performance to microphone array to be measured is tested, first calibrated locating for microphone array to be measured using method of substitution The sound pressure level of position.When calibration, microphone array to be measured is removed, and standard pick up facility is placed in microphone array to be measured Situ.Then, audiogenic device plays the sinusoidal signal that testing audio is 1kHz, 0dB by loudspeaker；And standard pickup is set It is standby to acquire the sinusoidal signal and export to the calculating equipment, signal is judged according to the signal received by the calculating equipment Sound pressure level whether be standard sound pressure level --- 94dB SPL.If the sound pressure level of the collected sinusoidal signal of standard pick up facility For non-standard sound pressure level, then the volume gain of audiogenic device and loudspeaker is adjusted, until the sound pressure level at standard pick up facility is The standard sound pressure level.After adjusting the sound pressure level at standard pick up facility, standard pick up facility is removed, and is placed to be measured Microphone array.

In addition, stablizing for guarantee system, after microphone array to be measured is placed, before performance test, start loudspeaker With microphone array to be measured, loudspeaker broadcasting audio and microphone acquisition audio is set to continue 10s, to complete to preheat.

As a result, by aforesaid operations, aforementioned applications scene can be formed.

As shown in Fig. 2, Fig. 2 is a kind of disclosure test method of microphone array shown according to an exemplary embodiment Flow chart, the method can be used in terminal, the described method comprises the following steps:

S101 receives the audio signal obtained after microphone array is acquired testing audio.

S102 handles the audio signal, and the single channel for obtaining each microphone is specified between parameter and microphone Interchannel specify parameter.

S103 specifies parameter and the specified parameter of the interchannel to determine the performance of microphone array according to the single channel, And output performance test result.

Wherein, it includes: sensitivity level, sensitivity level curve, noise level, total harmonic distortion ginseng that the single channel, which specifies parameter, Number, total harmonic distortion curve, signal-to-noise ratio, the tolerance of frequency response, leakproofness parameter and cut ridge parameter；The specified ginseng of the interchannel Number includes: frequency response parameter of consistency, time delay parameter of consistency and relevance parameter.

In the disclosure, the single channel specifies parameter to evaluate microphone array for the performance based on single microphone Partial properties, for example, the single channel for needing to obtain n microphone respectively is specified when microphone array is made of n microphone Parameter evaluates the performance of n microphone respectively, in this, as a portion of the performance of evaluation microphone array.And it is described Interchannel specifies parameter directly as another part of the performance of evaluation microphone array, for characterizing each logical of microphone array Relationship between road.

The testing audio is broadcasted by audiogenic device by the pronunciation end of loudspeaker, and by the pickup of the microphone array End acquisition.Wherein, the audiogenic device can be computer, cell phone apparatus, audio-frequence player device, and the terminals such as tablet device are set It is standby.The testing audio includes at least one of: the single frequency sinusoidal signal of 1kHz, 0dB, and 1kHz, sound pressure level are public affairs with -2dB It is the single frequency sinusoidal of preset value that difference, which is successively reduced to the break time between default sound pressure level and every two adjacent groups signal from 0dB, Signal sequence, mute signal, the logarithm swept-frequency signal of 20Hz~20kHz, 0dB, the white noise signal of 0dB, from lasting preset time The white noise signal sequence that is gradually decreased as tolerance from 120dB to sound pressure level using -3dB of 0dB white noise signal intensity.

In the present embodiment, to improve performance test efficiency, during the test, the single frequency sinusoidal signal is persistently played 10s；The single frequency sinusoidal signal sequence includes 15 groups of single frequency sinusoidal signals, and every group of single frequency sinusoidal signal is persistently played 3s, institute Stating default sound pressure level is -28dB, and the preset value is 2s；The logarithm swept-frequency signal is persistently played 10s；The white noise signal Persistently played 10s；The white noise signal sequence is persistently played 10s.

However, in other embodiments, the lasting play time, described default of each signal can be changed according to testing requirement Sound pressure level and the preset value.

In the present embodiment, to simplify the operation for playing testing audio in test process, to further increase performance test effect Rate, can by the single frequency sinusoidal signal, the single frequency sinusoidal signal sequence, the mute signal, the logarithm swept-frequency signal, The white noise signal and the white noise signal sequence are integrated in same a segment of audio, include required in performance test use to be formed All signals testing audio.For example, as shown in figure 3, Fig. 3 is a kind of disclosure survey shown according to an exemplary embodiment The schematic diagram of audition frequency, in Fig. 3, the signified place of label A is the waveform diagram of testing audio, and the signified place of label B is test tone The spectrogram of frequency, the signal in region locating for label C is white noise signal, and the signal in region locating for label D is that logarithm frequency sweep is believed Number, the signal in region locating for label E is sinusoidal signal.At this point, calculating equipment whole to microphone array institute collected one Section audio signal in the process of processing, needs to identify described one whole section audio signal and is divided into a few cross-talk audios Signal, to obtain corresponding parameter according to different consonant audio signalprocessings.Wherein it is possible to according between the time between each signal Every for example, signal segmentation is realized at the beginning of the termination time of a signal and another signal, alternatively, can be every adjacent two The signal divided for identification is intercutted between signal, using as distinguishing mark, to realize that signal is divided.

It certainly, can also be by the single frequency sinusoidal signal, the single frequency sinusoidal signal sequence in other variant embodiments Column, the mute signal, the logarithm swept-frequency signal, the white noise signal and the white noise signal sequence are integrated in difference respectively Audio in, and form multiple testing audios.

For the computational efficiency for improving above-mentioned each parameter, in the present embodiment, the step S102 includes the following steps Sa~Sh At least one of:

Sa obtains the sensitivity level of each microphone, including step Sa1~Sa2.

Sa1 obtains each collected audio letter of microphone institute when testing audio is the single frequency sinusoidal signal of 1kHz, 0dB Number output voltage；

Sa2 is based on each output voltage and preset input acoustic pressure, calculates separately to obtain the sensitivity level of each microphone.

Wherein, the step Sa2 includes step Sa21 and Sa22:

Sa21 calculates ratio of each output voltage respectively with preset input acoustic pressure, obtains the sensitivity of each microphone；

Sa22 is bottom with 10, calculates separately the logarithm of each sensitivity and 20 product, obtains the sensitive of each microphone Spend grade.

In the present embodiment, the sensitivity is indicated: the output voltage virtual value U and standard sound of single channel (microphone) Press P₀Ratio, wherein the standard sound pressure P₀For 94dB SPL, that is, the preset input acoustic pressure is the standard sound Pressure.Then, single pass sensitivity level S can be calculated by the following formula to obtain: S=201g (U/P₀)。

Then, when needing to measure the sensitivity level of each microphone in microphone array, it can use audiogenic device through raising The single frequency sinusoidal signal that sound device plays 1kHz, 0dB continues 10s, so that microphone array acquires current testing audio, and is input to It calculates in equipment.Then calculating equipment can be according to step Sa1~Sa2 to microphone array currently collected audio signal progress Processing, obtains the sensitivity level of each microphone.

Sb obtains the sensitivity curve of each microphone, including step Sb1~Sb2.

Sb1, when testing audio is 1kHz, sound pressure level with -2dB is that tolerance is successively reduced to from 0dB default sound pressure level and every When break time between two adjacent groups signal is the single frequency sinusoidal signal sequence of preset value, calculate each microphone array be listed in it is each The sensitivity level of single frequency sinusoidal signal；

Sb2 generates sensitivity level with sound pressure level in the sensitivity level of each single frequency sinusoidal signal according to each microphone respectively The curve of variation obtains the sensitivity curve of each microphone.

Optionally, the default sound pressure level is -28dB, and the preset value is 2s.Then it is found that list in the step Sb1 Frequency sinusoidal signal sequence one shares that 15 groups of frequencies are identical but the mutually different single frequency sinusoidal signal of sound pressure level.In addition, the step In Sb1, each microphone array is listed in the visible step Sa1~Sa2 of calculation of the sensitivity level of each single frequency sinusoidal signal, This will not be repeated here.

In the present embodiment, the sensitivity curve is for measuring sound of the single channel under different sound pressure level single frequency sinusoidal signals Electric transfer capability.

Then, in the sensitivity level curve for needing to measure each microphone in microphone array, it can use audiogenic device The single frequency sinusoidal signal for playing 1kHz, 0dB through loudspeaker continues 3s, then plays mute signal 2s or stops playing any audio 2s；Play 1kHz again, the single frequency sinusoidal signal of -2dB continues 3s, then play mute signal 2s or stop playing any audio 2s；Then play 1kHz, the single frequency sinusoidal signal of -4dB continues 3s；Thus in accordance with the rule, successively broadcast using 2s as time interval The single frequency sinusoidal signal that 2dB is reduced than the sound pressure level of upper single frequency sinusoidal signal is put, until currently playing single frequency sinusoidal signal Sound pressure level be reduced to -28dB.To which microphone array can collect the audio signal with different sound pressure levels, and it is input to It calculates in equipment.Then calculating equipment can be according to step Sb1~Sb2 to microphone array currently collected audio signal progress Processing, obtains the sensitivity level curve of each microphone.

Sc obtains the total harmonic distortion parameter of each microphone, including step Sc1.

Sc1 believes when testing audio is the single frequency sinusoidal signal of 1kHz, 0dB according to the collected audio of each microphone Number, the total harmonic distortion parameter of each microphone is calculated.

In the present embodiment, the total harmonic distortion parameter is indicated: the virtual value of the harmonic components in output voltage with comprising The percentage of the ratio of the total voltage of fundamental component.The total harmonic distortion parameter THD can be calculated by the following formula to obtain:Wherein, U_nfIndicate the voltage effective value of n-th harmonic component, U_tIndicate that fundamental frequency is total The virtual value of voltage.

Then, when needing to test the total harmonic distortion parameter of each microphone, first by the sound pressure level at microphone array from 94dB SPL is adjusted to 106dB SPL, and audiogenic device is recycled to hold by the single frequency sinusoidal signal that loudspeaker plays 1kHz, 0dB Continuous 10s, so that each microphone acquires current audio signals and is input to calculating equipment.Calculating equipment can count according to step Sc1 Calculation obtains the total harmonic distortion parameter of each microphone.

Sd obtains the total harmonic distortion curve of each microphone, including step Sd1.

Sd1, when testing audio is 1kHz, sound pressure level with -2dB is that tolerance is successively reduced to from 0dB default sound pressure level and every When break time between two adjacent groups signal is the single frequency sinusoidal signal sequence of preset value, according to the collected sound of each microphone Frequency signal calculates total harmonic distortion parameter of the audio signal under each sound pressure level, and generates total harmonic distortion curve.

The meaning of testing audio in the step Sd1 is identical as the meaning of testing audio in the step Sb1, herein It does not repeat.But before needing to measure the total harmonic distortion curve of each microphone, must by the sound pressure level at microphone array from 94dB SPL is adjusted to 106dB SPL.

In the present embodiment, the total harmonic distortion curve is the curve that harmonic distortion changes with sound pressure level, each for reflecting Microphone acquires harmonic distortion situation caused by the single frequency sinusoidal signal of different sound pressure levels.

Se obtains the noise level of each microphone, including step Se1 and Se2.

Se1 obtains that each microphone institute is collected to make an uproar when testing audio is mute signal or pause plays testing audio The voltage gross energy of acoustical signal；

Se2 is based on each voltage gross energy, calculates separately the full frequency band gross energy for obtaining each microphone, the full frequency band is total Energy is the noise level.

In the present embodiment, the noise level is indicated: under quiet environment, the energy of the noise signal of single channel output, Unit is dB.

The step Se2 include: calculated separately with 10 the bottom of for each voltage gross energy logarithm and 10 product, obtain The full frequency band gross energy of each microphone.Then it is found that the noise level of each microphone, i.e. full frequency band gross energy GN can pass through following public affairs Formula is calculated: GN=20lgE_noise；E_noiseIt is defeated to indicate that single microphone terminates institute in this period to acquisition since acquisition Voltage gross energy out, acquisition modes can learn that this will not be repeated here from the relevant technologies.

Then, when needing to measure the noise level of each microphone in microphone array, it can use audiogenic device through loudspeaking Device plays mute signal or stops playing any audio, so that microphone array works under quiet environment, and will collect Noise signal be input to calculate equipment in.Microphone array can currently be acquired according to step Se1~Se2 by then calculating equipment To noise signal handled, obtain the noise level of each microphone.

Sf obtains the signal-to-noise ratio of each microphone, including step Sf1.

Sf1 calculates the sensitivity level of each microphone and the difference of its noise level, obtains the signal-to-noise ratio of each microphone.

In the present embodiment, the signal-to-noise ratio is indicated: the energy ratio denary logarithm of echo signal and noise signal With 10 product, unit dB.That is, the Signal to Noise Ratio (SNR) of each microphone can be calculated by the following formula to obtain: SNR=S-GN. Wherein, the acquisition process of the calculation formula of the Signal to Noise Ratio (SNR) are as follows:

Wherein, it after the sensitivity level and the noise level that obtain each microphone respectively by step Sa and Se, can directly utilize The signal-to-noise ratio of each microphone is calculated in the data of acquisition, to be further simplified the calculating step of parameter and improve the calculating of parameter Efficiency.

Sg obtains the tolerance of the frequency response of each microphone, including step Sg1 and Sg2.

Sg1, it is collected according to each microphone when testing audio is the logarithm swept-frequency signal of 20Hz~20KHz, 0dB Audio signal generates frequency response curve；

Sg2 calculates the difference of the maxima and minima of each frequency response curve, obtains the tolerance of the frequency response of each microphone.

In the present embodiment, the frequency response curve is indicated: the curve that single pass sensitivity level changes with testing audio frequency. According to the step Sg1, the frequency range of obtained frequency response curve and the frequency range of testing audio are identical, i.e. and 20Hz~ 20kHz；In this frequency range, the value of frequency response corresponding to each Frequency point is corresponding sensitivity level.The step In rapid Sg2, the maximum value indicates that the maximum frequency response of frequency response curve, the minimum value indicate the minimum frequency of frequency response curve Rate response.In one embodiment, be the accuracy for improving frequency response tolerance obtained, the maximum value of each frequency curve and Minimum value is respectively maximum frequency response and minimum frequency response of the frequency response curve in 100Hz~8kHz.

Then, when needing to measure the noise level of each microphone in microphone array, it can use audiogenic device through loudspeaking Device plays 20Hz~20kHz, the logarithm swept-frequency signal of 0dB continues 10s, so that microphone array acquires current testing audio, and Collected audio signal is input to and is calculated in equipment.Then calculating equipment can be according to step Sg1~Sg2 to microphone array Current collected audio signal is handled, and the frequency response tolerance of each microphone is obtained.

Sh obtains the external leakproofness parameter in the leakproofness parameter of each microphone, including step Sh1~Sh2.

Sh1 calculates each microphone and adopts when sound hole is unsealed when the testing audio is the white noise signal of 0dB First single-frequency point energy of each frequency point of the audio signal collected, and calculate each microphone and collected when sound hole is sealed Audio signal each frequency point the second single-frequency point energy；

Sh2 obtains the single-frequency point of each microphone based on the first single-frequency point energy and the second single-frequency point energy balane Energy difference mean value, the single-frequency point energy difference mean value are the external leakproofness parameter in the leakproofness parameter.

In the present embodiment, the external leakproofness parameter is used to reflect the acoustic conductivity of non-sound hole outside microphone array Can, unit dB.

In one embodiment, the step Sh1 may include: to calculate each wheat when testing audio is the white noise signal of 0dB The average energy of gram wind each frequency point of collected audio signal when sound hole is unsealed, obtains the first single-frequency point energy Measure mean value；And the average energy of each microphone each frequency point of collected audio signal when sound hole is sealed is calculated, Obtain the second single-frequency point average energy value；The step Sh2 may include: the first single-frequency point energy based on each frequency point of each microphone Mean value and the second single-frequency point average energy value are measured, the single-frequency point energy difference mean value of each microphone is calculated；The single-frequency point energy Poor mean value is the external leakproofness parameter.

First single-frequency point average energy value E of each microphone_openIt can be calculated by the following formula to obtain: Wherein, E_open-allIndicate gross energy of the output signal of current microphone under full frequency band；ω_allIndicate the defeated of current microphone The full frequency band of signal out.In addition, the second single-frequency point average energy value E of each microphone_sealedComputing Principle can refer to described first The Computing Principle of single-frequency point energy, this will not be repeated here.

In the step Sh2, the single-frequency point energy difference mean value ES of each microphone can be calculated by the following formula to obtain:

Then, it when needing to measure the external leakproofness parameter of each microphone in microphone array, is passed through using audiogenic device The white noise signal that loudspeaker plays 0dB continues 10s.Allow microphone array respectively under normal circumstances (sound hole is unsealed) and In the case that sound hole is by physical seal, acquires audio signal and be input to calculating equipment.Calculating equipment can be according to step Sh1 ~Sh2 handles two kinds of audio signals, obtains the external leakproofness parameter of each microphone.

In another embodiment, the step Sh1 may include step Sh11, the step Sh2 may include Sh21 and Sh22。

Sh11 calculates each microphone and adopts when sound hole is unsealed when the testing audio is the white noise signal of 0dB The energy of each frequency point of the audio signal collected obtains the first single-frequency point energy；And it is close in sound hole to calculate each microphone The energy of each frequency point of collected audio signal when envelope, obtains the second single-frequency point energy.

Sh21 is based on all first single-frequency point energy and all second single-frequency point energy, each frequency point of each microphone is calculated Single-frequency point energy difference.Wherein, the single-frequency point energy difference ES1 can be calculated by the following formula to obtain: The E_0-allFor the sum of all first single-frequency point energy；The E_s-allFor the sum of all second single-frequency point energy.

Sh22 calculates the summation of all single-frequency point energy differences and the ratio of full frequency band, obtains the single-frequency point energy of each microphone Poor mean value is measured, the single-frequency point energy difference mean value is the external leakproofness parameter in the leakproofness parameter.Wherein, the single-frequency Point energy difference mean value ES can be calculated by the following formula to obtain:ω_allIndicate the output signal of current microphone Full frequency band.

Si obtains the time delay parameter of consistency of microphone array, including step Si1~Si2.

Si1, according to the collected audio signal of each microphone, calculates every two when testing audio is the white noise signal of 0dB Delay inequality between the collected audio signal of microphone；

Si2 calculates the average value of all delay inequalitys, obtains the time delay parameter of consistency of microphone array.

Wherein, the delay inequality m between every two microphone can be calculated by the following formula to obtain: Wherein, x and y respectively indicate two microphones collected signal (the output letter in two channels Number), N is signal length, R_xyIt (m) is the correlation in two channels.In above-mentioned formula, work as R_xy(m) when there is maximum value, when The value of preceding m is the delay inequality between current two microphone.

In addition, calculating the quotient of the summation of all delay inequalitys and the total quantity of all delay inequalitys, all delay inequalitys can be obtained Average value, which is the time delay parameter of consistency of multichannel.

Then, in the time delay parameter of consistency for needing to measure microphone array, 0dB is played through loudspeaker using audiogenic device White noise signal continue 10s so that microphone array acquisition and is input to calculating equipment at audio signal.Calculating equipment can basis Step Si1~Si2 handles audio signal, obtains the time delay parameter of consistency of microphone array.

Sj obtains the relevance parameter of microphone array, including step Sj1~Sj2.

Sj1, according to the collected audio signal of each microphone, calculates every two when testing audio is the white noise signal of 0dB Relative coefficient between the collected audio signal of microphone；

Sj2 calculates the average value of all relative coefficients, obtains the relevance parameter of microphone array.

In the present embodiment, correlation indicates the degree of correlation of the signal of any two interchannel in microphone array.

Wherein, the relative coefficient CC of the signal of every two interchannel can be calculated by the following formula to obtain: Wherein, X and Y respectively indicates the output signal in two channels, and E (XY) indicates the expectation of signal XY, and E (X) is indicated The expectation of signal X, E (Y) indicate the expectation of signal Y, ρ_XIndicate the mean square deviation of signal X, ρ_YIndicate the mean square deviation of signal Y.

In addition, calculating the quotient of the summation of all relative coefficients and the total quantity of all relative coefficients, institute can be obtained There is the average value of relative coefficient, which is the relevance parameter of multichannel.

Then, in the correlation for needing to measure microphone array, believed using the white noise that audiogenic device plays 0dB through loudspeaker Number continue 10s, so that microphone array acquisition and is input to calculating equipment at audio signal.Calculating equipment can be according to step Sj1 ~Sj2 handles audio signal, obtains the relevance parameter of microphone array.

Sk obtains the cut ridge parameter of each microphone, including step Sk1~Sk2.

Sk1, when testing audio be from the 0dB white noise signal intensity of lasting preset time to sound pressure level with -3dB be tolerance from When the white noise signal sequence that 120dB gradually lowers, signal waveforms are generated according to the collected audio signal of each microphone；

Sk2, sound pressure level when determining that cut ridge occurs for the collected audio signal of each microphone according to each signal waveforms, obtains To cut ridge parameter.

In the present embodiment, cut ridge is defined as: because signal waveform amplitude is too big, and the linear model that waveform exceeds system occur The phenomenon that enclosing.

Then, in the cut ridge parameter for needing to measure each microphone, believed using the white noise that audiogenic device plays 0dB through loudspeaker Number continue 10s, then adjusting loudspeaker gradually decreases the sound pressure level of white noise signal played with the frequency of every 3dB by 120dB, So that each microphone acquisition audio signal and input calculating equipment.Each channel can be judged according to step Sk1~Sk2 by calculating equipment Sound pressure level when whether occurring cut ridge phenomenon, and each channel to cut ridge occur is as cut ridge parameter.

SL obtains the frequency response parameter of consistency of microphone array, including step SL1a~SL2a.

SL1a calculates the average value of the corresponding all frequency responses of each frequency point, obtains each according to all frequency response curves The multi-channel frequency response mean value of frequency point；

SL2a calculates the frequency response of each frequency point of each frequency response curve and the difference of corresponding multi-channel frequency response mean value, Obtain the mean value error of the frequency response of each frequency point of each frequency response curve, and by the mean value error of the frequency response of each microphone with The curve of frequency variation is created in same image, obtains the consistent linearity curve of interchannel frequency response；The interchannel frequency response consistency Curve is frequency response parameter of consistency.

In the present embodiment, the frequency response consistency indicates the frequency response difference of each interchannel, for reflecting each interchannel frequency response The deviation of characteristic.

Hereinafter, the illustratively meaning of the multi-channel frequency response mean value of each frequency point:

Assuming that microphone array is made of N number of microphone, that is, there is N number of channel, then the signal based on microphone array acquisition, N frequency response curve can be obtained.If frequency response of the every frequency response curve at frequencies omega is respectively S₁(ω)、S₂(ω)、… S_N(ω), then, and the multi-channel frequency response mean value at this frequency point of frequencies omegaIt can be calculated by the following formula It arrives:Wherein, (0,8kHz) ω ∈, ch indicate the mark of current channel, ch=1,2,3 ..., N.

Then, the illustratively meaning of the mean value error of the frequency response of each frequency point of each frequency response curve:

Based on above-mentioned example, the mean value error of frequency response of each frequency response curve at this frequency point of frequencies omega It can be calculated by the following formula to obtain:

Pass through the step SL1a and frequency response parameter of consistency that SL2a is obtained --- the consistent linearity curve of interchannel frequency response, it can It is showed in display screen, realizes the judgement to the Frequency Response of microphone array to be tested personnel's observation.

In another embodiment, the acquisition of the frequency response parameter of consistency to microphone array can be realized in other ways, Refer to following steps SL1b~SL4b.

SL1b calculates the average value of the corresponding all frequency responses of each frequency point, obtains each according to all frequency response curves The multi-channel frequency response mean value of frequency point；

SL2b calculates the frequency response of each frequency point of each frequency response curve and the difference of corresponding multi-channel frequency response mean value Absolute value obtains the modulus value of the mean value error of the frequency response of each frequency point of each frequency response curve；

SL3b calculates the average value of the corresponding all modulus value of each frequency point, obtains the modulus value mean value of each frequency point；

SL4b, all frequency points are in turn divided into continuous 3 frequency ranges by sequence by size, calculate separately all moulds of each frequency range It is worth the quotient of mean value summation and band bandwidth, obtains the frequency response mould mean value of each frequency range；The frequency response mould mean value is frequency response consistency ginseng Number.

The frequency response parameter of consistency obtained by the step SL3~SL6 --- frequency response mould mean value can directly be set by calculating The judgement to the Frequency Response of microphone array is realized automatically for application.

Wherein, the aforementioned explanation to the SL1a can be found in the explanation of the SL1b, this will not be repeated here.

In the step SL2b, the modulus value A (ω) of the mean value error of the frequency response of each each frequency point of frequency response curve is equal It is worth errorAbsolute value, it may be assumed that

In the step SL3b, the modulus value mean value B (ω) of each frequency point can be calculated by the following formula to obtain:

In the step SL4b, optionally, 3 frequency ranges be respectively (100Hz, 400Hz], (400Hz, 3400Hz], (3400Hz, 8000Hz].The frequency response mould mean value FRC of each frequency range can be calculated by the following formula to obtain:Wherein, ω₁Indicate the initial frequency of current frequency range, ω₂Expression is worked as The cutoff frequency of preceding frequency range.

Thus, it is possible to realize the acquisition of above-mentioned mentioned parameter by step Sa~SL.However, in other embodiments In, there is also the other modes of available above-mentioned parameter, at this point, one or more steps in the step Sa~SL can quilt Other calculations are replaced in the related technology, and the step S102 is not limited to one or more in the step Sa~SL ?.But it needs it is clear that the step Sa~SL can preferably improve the acquisition efficiency of parameter, reduce the calculation amount of parameter.

In addition, the disclosure does not limit the sequencing of the step Sa~SL, that is, in other embodiments, it can basis Logical relation between the step Sa~SL, and the sequence that executes of the step Sa~SL is adaptively adjusted, the execution Sequence is not unique.

It, can be by each parameter obtained by the step S102 and corresponding parameter preset threshold value in the step S103 It compares, and judges whether each parameter meets preset requirement respectively；Wherein, each preset parameter threshold can by tester according to Experience is default, and this will not be repeated here.The performance test results include acceptance or rejection.Wherein, only when all parameters are all full When sufficient preset requirement, the performance test results are just qualified.

However, in another embodiment, can classify and evaluate the performance of microphone array to be measured, for example, the performance is surveyed Test result may include: unqualified, qualified, medium, good, outstanding.Adaptably, each parameter preset threshold value includes: qualified threshold Value, intermediate. threshold, good threshold and outstanding threshold value.

In one embodiment, to improve the accuracy evaluated microphone property, the specified parameter of the single channel further includes Frequency range single-frequency point average energy value.The step S102 can with the following steps are included:

Sm obtains the frequency range single-frequency point average energy value of each microphone, including step Sm1.

Sm1, when testing audio is mute signal or pause plays the testing audio, by the working frequency range of each microphone Be divided into continuous 3 frequency ranges, calculate separately each microphone collected noise signal each frequency point in each frequency range Average energy obtains the frequency range single-frequency point average energy value of each frequency range of each microphone.

In one embodiment, by the working frequency range of each microphone (0,8kHz] be divided into (0,80Hz], (80,4kHz] and (4kHz, 8kHz] this 3 frequency ranges.The then average energy GN of each frequency range_fIt can be calculated by the following formula to obtain:Wherein, E (ω) is the signal energy in frequencies omega, ω₁Indicate the initial frequency of current frequency range, ω₂Table Show the cutoff frequency of current frequency range.

Then, in the frequency range single-frequency point average energy value for needing to test each microphone, it can use audiogenic device through loudspeaker It plays mute signal or stops playing any audio, so that microphone array works under quiet environment, and will be collected Noise signal, which is input to, to be calculated in equipment.Then calculating equipment can make an uproar according to step Sm1 is currently collected to microphone array Acoustical signal is handled, and the frequency range single-frequency point average energy value of each frequency range of each microphone is obtained.

When carrying out performance judgement, it must judge whether each frequency range single-frequency point average energy value all meets preset requirement.Wherein, Be unsatisfactory for preset requirement simply by the presence of a frequency range single-frequency point average energy value, to microphone property be evaluated as it is unqualified.

However, in other embodiments, can suitably adjust and be unsatisfactory for according to the practical application request to microphone array The permission quantity of the frequency range single-frequency point average energy value of preset requirement, as long as that is, being unsatisfactory for the frequency range single-frequency point energy of preset requirement The quantity of mean value is measured without departing from specified quantity, the performance test results of microphone would not be influenced.

In one embodiment, for further increase to microphone property evaluation accuracy, be based on aforementioned any embodiment, The leakproofness parameter can also include inner sealing parameter.The step S102 can with the following steps are included:

Sn obtains the inner sealing parameter of each microphone, including step Sn1~Sn2.

It is collected when sound hole is sealed to calculate each microphone when testing audio is the white noise signal of 0dB by Sn1 Audio signal obtains third single-frequency point average energy value in the average energy of each frequency point；

When testing audio is mute signal or stops playing, it is collected when sound hole is sealed to calculate each microphone Signal obtains the 4th single-frequency point average energy value in the average energy of each frequency point；

Sn2, third single-frequency point average energy value and the 4th single-frequency point average energy value based on each microphone, is calculated interior list Frequency point energy difference mean value；The interior single-frequency point energy difference mean value is the inner sealing parameter.

In the present embodiment, the inner sealing parameter is for reflecting sound conductivity inside microphone array, unit dB. In addition, the third single-frequency point average energy value E of each microphone_interWith the 4th single-frequency point average energy value E_noise/alllComputing Principle can Referring to the Computing Principle of the first single-frequency point energy, this will not be repeated here.

In the step Sn2, the calculation formula of the interior single-frequency point energy difference mean value IS of each microphone can be with are as follows:

Then, in the inner sealing parameter for needing to measure each microphone in microphone array, first by speaker volume It is adjusted to 94dB SPL@1kHz, the white noise signal for recycling audiogenic device to play 0dB through loudspeaker continues 10s, then plays quiet Sound signal stops playing any audio.When so that microphone array being listed in sound hole by physical seal, respectively in above two feelings Signal is acquired under condition, and is input to calculating equipment.Two kinds of audio signals can be carried out according to step Sn1~Sn2 by calculating equipment Processing, obtains the inner sealing parameter of each microphone.

In one embodiment, for further increase to microphone property evaluation accuracy, be based on aforementioned any embodiment, It can also include phase equalization parameter that the interchannel, which specifies parameter,.The step S102 can with the following steps are included:

So obtains the phase equalization parameter of microphone array, including step So1~So2.

So1, when the testing audio is the logarithm swept-frequency signal of 20Hz~20kHz, 0dB, respectively according to each microphone Collected audio signal generates corresponding phase curve；

So2 determines phase curve similitude according to all phase curves, obtains phase equalization parameter.

In the present embodiment, using the similitude between all phase curves as the phase equalization parameter.The phase one Cause property parameter is used to reflect the phase deviation of each interchannel of microphone array.

In one embodiment, how according to the corresponding phase curve of the collected audio signal generation of each microphone, it is seen that The relevant technologies；And how according to all phase curves to determine the similitude between curve, it can also see the relevant technologies；It does not go to live in the household of one's in-laws on getting married herein It states.Wherein it is possible to all phase curve consolidations be shown in same width figure, at this point, tested personnel can rule of thumb judge Similitude between curve, alternatively, can be by calculating the similitude between equipment calculating phase curve, and output phase consistency is joined Several and test result.

Then, it in the phase equalization parameter for needing to measure microphone array, is played using audiogenic device through loudspeaker 20Hz~20kHz, 0dB logarithm swept-frequency signal continue 10s.It is set so that microphone array acquires audio signal and is input to calculating It is standby.Current audio signals can be handled according to step So1~So2 by calculating equipment, obtain phase equalization parameter.

In one embodiment, for convenience of the performance test to microphone array, testing efficiency is improved, is based on aforementioned any reality It is further comprising the steps of before handling the audio signal on the basis of applying example:

S102a shows man-machine interface when detecting enabled instruction；The man-machine interface at least shows the single-pass Parameter name, the interchannel is specified to specify parameter name and the one-to-one multiple selection controls of each parameter name and ginseng in road Number calculates control；

S102b, when receive parameter calculate control be triggered caused by instruction when, it is true according to the selection control being triggered The parameter of fixed current desired calculating.

In one embodiment, disclosed method can be applied in application software, to be realized by application software to wheat The processing of gram wind array signal collected, and output performance test result.Then in the step S102a, when the application is soft When part is activated, application software can detect enabled instruction.

Optionally, as shown in figure 4, Fig. 4 is that the disclosure is shown according to an exemplary embodiment a kind of for testing Mike The schematic diagram of the man-machine interface of the application software of wind array performance can also be in people other than the content configured in step S102a Machine interface configurations be used for select microphone array institute collected audio signal browse controls G and user cut it is currently selected The cutting control H for the audio signal selected；It as a result, can be by browse controls G according to the collected audio of microphone array institute need to be selected Signal, and as the calculating of currently selected fixed parameter basis.In addition, when selected audio signal includes a variety of audio signals When, the automatic identification and segmentation to signal can be realized by cutting control H, so that multiple parameters can disposably be obtained by realizing. Wherein, as shown in figure 5, Fig. 5 is after disclosure browse controls G shown according to an exemplary embodiment is clicked, to be popped up The interface schematic diagram of audio file application interface is configured, in one embodiment, can also in addition configure one for configuring audio text The application interface of part, for example, after browse controls G is clicked, the control application interface pop-up for configuring audio file. In the application interface for configuring audio file, the required a variety of test signals used in the disclosure can be each configured with Select control, as shown in figure 5, configured with respectively with a variety of test signals multiple browse controls correspondingly, it is possible thereby to reality A variety of audio signals are now disposably inputted, testing efficiency is further increased.

By step S102a and S102b, tester can be according to the parameter that need to select current desired test, for example, in wheat The partial parameters of gram wind array have been known, and when being not necessarily to retest, can only selects by the man-machine interface currently The parameter of required acquisition computes repeatedly to avoid parameter and reduces parameter calculation amount, then correspondingly, the step S102b it Afterwards, it may include step S102c: audio signal currently entered being handled according to the parameter of current desired calculating, is obtained The parameter of current desired calculating.

The disclosure passes through the application software that can run the test method of the microphone array as a result, does not realize The personnel of solution signal processing and acoustic knowledge can also complete the performance test to microphone array by the application software, thus Threshold, difficulty of test and the array parameter for reducing the performance test of microphone array extract difficulty.Also, tester only needs Carry out microphone array institute the selection operation of collected audio signal, the selection operation of the parameter of required calculating, parameter calculating The clicking operation of control can get parms as a result, to further improve testing efficiency and simplify test operation.

It is corresponding with the embodiment of the test method of aforementioned microphone array, as shown in fig. 6, Fig. 6 is that the disclosure is shown according to one Example property implements a kind of structural block diagram of the test device of the microphone array exemplified, and the disclosure additionally provides a kind of microphone array The test device 30 of column is applied in terminal, comprising:

Receiving module 31, is configured as: receiving the audio signal obtained after microphone array is acquired testing audio；

Processing module 32, is configured as: handling the audio signal, obtains the specified ginseng of single channel of each microphone Interchannel between several and microphone specifies parameter；

Output module 33, is configured as: specifying parameter and the interchannel that parameter is specified to determine wheat according to the single channel The performance of gram wind array, and output performance test result.

As shown in fig. 7, Fig. 7 is a kind of disclosure test device of microphone array shown according to an exemplary embodiment Structural block diagram, the processing module 32 includes at least one of: it is bent that sensitivity curve obtains module 321, total harmonic distortion Line generation module 322, noise level acquisition module 323, signal-to-noise ratio computation module 324, frequency response tolerance acquisition module 325, outside are close Envelope property parameter acquisition module 326, time delay consistency obtain module 327, correlation obtains module 328 and cut ridge parameter obtains mould Block 329.

Optionally, the sensitivity curve acquisition module 321 includes:

Sensitivity level acquisition submodule, is configured as: when the testing audio is 1kHz, sound pressure level with -2dB be tolerance from It is the single frequency sinusoidal signal of preset value that 0dB, which is successively reduced to the break time between default sound pressure level and every two adjacent groups signal, When sequence, each microphone is calculated in the sensitivity level of each single frequency sinusoidal signal；

Sensitivity level curve acquisition submodule, is configured as: respectively according to each microphone in each single frequency sinusoidal signal Sensitivity level generates the curve that sensitivity level changes with sound pressure level, obtains the sensitivity level curve of each microphone.

Optionally, the total harmonic distortion curve generation module 322 is configured as: when the testing audio is 1kHz, sound Arbitrarily downgrading with -2dB is that be successively reduced to from 0dB the break time between default sound pressure level and every two adjacent groups signal be pre- to tolerance If, according to the collected audio signal of microphone array, calculating the audio signal every when the single frequency sinusoidal signal sequence of value Total harmonic distortion parameter under one sound pressure level, and generate total harmonic distortion curve.

Optionally, the noise level acquisition module 323 includes:

Voltage gross energy acquisition submodule, is configured as: when the testing audio is described in mute signal or pause broadcasting When testing audio, obtain each microphone collected noise signal voltage gross energy；

Noise level computational submodule, is configured as: being based on each voltage gross energy, calculates separately to obtain the full range of each microphone Section gross energy, the full frequency band gross energy are the noise level.

Optionally, the signal-to-noise ratio computation module 324 is configured as: calculating the sensitivity level and its noise level of each microphone Difference, obtain the signal-to-noise ratio of each microphone.

Optionally, the frequency response tolerance acquisition module 325 includes:

Frequency response curve generates submodule, is configured as: when the logarithm frequency sweep that the testing audio is 20Hz~20kHz, 0dB When signal, frequency response curve is generated according to the collected audio signal of each microphone；

Frequency response tolerance computational submodule, is configured as: calculating the difference of the maxima and minima of each frequency response curve, obtains each The tolerance of the frequency response of microphone.

Optionally, the external leakproofness parameter acquisition module 326 includes:

Energy balane submodule, is configured as: when the testing audio is the white noise signal of 0dB, calculating each microphone The first single-frequency point energy of each frequency point of collected audio signal when sound hole is unsealed, and calculate each microphone and exist Second single-frequency point energy of sound hole each frequency point of collected audio signal when being sealed；

Energy difference mean value computation submodule, is configured as: being based on the first single-frequency point energy and the second single-frequency point energy The single-frequency point energy difference mean value of each microphone is calculated, the single-frequency point energy difference mean value is outer in the leakproofness parameter Portion's leakproofness parameter.

Optionally, the time delay consistency acquisition module 327 includes:

Delay inequality computational submodule, is configured as: when the testing audio is the white noise signal of 0dB, according to each Mike The collected audio signal of wind calculates the delay inequality between every collected audio signal of two microphones；

Time delay parameter of consistency computational submodule, is configured as: calculating the average value of all delay inequalitys, obtains microphone array The time delay parameter of consistency of column.

Optionally, the correlation acquisition module 328 includes:

Relative coefficient computational submodule, is configured as；When the testing audio is the white noise signal of 0dB, according to each The collected audio signal of microphone calculates the relative coefficient between every collected audio signal of two microphones；

Relevance parameter computational submodule, is configured as: calculating the average value of all relative coefficients, obtains microphone array The relevance parameter of column.

Optionally, the cut ridge parameter acquisition module 329 includes:

Waveform diagram generates submodule, is configured as: when the testing audio is the 0dB white noise signal from lasting preset time It is collected according to each microphone when being changed to sound pressure level using -3dB as the white noise signal sequence that tolerance is gradually decreased from 120dB Audio signal generates signal waveforms；

Cut ridge parameter acquisition submodule, is configured as: determining the collected audio of each microphone according to each signal waveforms Sound pressure level when cut ridge occurs for signal, obtains cut ridge parameter.

In one embodiment, it can also include: frequency range single-frequency point average energy value that the single channel, which specifies parameter,.The processing Module can also include:

Frequency range single-frequency point average energy value computing module, is configured as: when the testing audio is that mute signal or pause are broadcast When putting the testing audio, the working frequency range of each microphone is divided into continuous 3 frequency ranges, each microphone is calculated separately and is adopted The average energy of the noise signal collected each frequency point in each frequency range obtains the frequency range single-frequency point of each frequency range of each microphone Average energy value.

In one embodiment, the processing module further includes that frequency response consistency obtains module.

Optionally, the frequency response consistency acquisition module includes:

Interchannel frequency response mean value computation submodule, is configured as: according to all frequency response curves, it is corresponding to calculate each frequency point The average value of all frequency responses obtains the multi-channel frequency response mean value of each frequency point；

Frequency response parameter of consistency acquisition submodule, is configured as: calculate each frequency point of each frequency response curve frequency response and The difference of corresponding multi-channel frequency response mean value obtains the mean value error of the frequency response of each frequency point of each frequency response curve, and will The mean value error of the frequency response of each microphone curve varying with frequency is created in same image, obtains interchannel frequency response one Cause linearity curve；The consistent linearity curve of the interchannel frequency response is frequency response parameter of consistency.

In another embodiment, the another embodiment of module, the frequency response consistency are obtained as frequency response consistency Obtaining module includes:

Frequency response mean value error magnitude calculation submodule, is configured as: calculating the frequency response of each frequency point of each frequency response curve With the absolute value of the difference of corresponding multi-channel frequency response mean value, the mean value of the frequency response of each frequency point of each frequency response curve is obtained The modulus value of error；

Single-frequency point modulus value mean value computation submodule, is configured as: the average value of the corresponding all modulus value of each frequency point is calculated, Obtain the modulus value mean value of each frequency point；

Frequency response parameter of consistency computational submodule, is configured as: all frequency points are in turn divided into continuously by sequence by size 3 frequency ranges, calculate separately the quotient of each frequency range all modulus value mean value summations and band bandwidth, the frequency response mould for obtaining each frequency range is equal Value；The frequency response mould mean value is frequency response parameter of consistency.

In one embodiment, described device can also include display module and parameter determination module.

The display module, is configured as: when detecting enabled instruction, showing man-machine interface；The man-machine interface is extremely The specified parameter name of the single channel is shown less, the interchannel specifies parameter name, one-to-one with each parameter name Multiple selection controls and parameter calculate control.

The parameter determination module, is configured as: when receive parameter calculate control be triggered caused by instruction when, root The parameter of current desired calculating is determined according to the selection control being triggered, and is sent to the processing module.

It include the embodiment of display module and parameter determination module, the processing module based on device further include:

Specified parameter computation module, is configured as: according to the current desired calculating of parameter determination module transmission Parameter obtains to the Audio Signal Processing and exports required parameter.

The function of modules and the realization process of effect are specifically detailed in the above method and correspond to step in above-mentioned apparatus Realization process, details are not described herein.

Corresponding with the embodiment of the test method of aforementioned microphone array, the disclosure also provides a kind of survey of microphone array Test system, the test macro include audiogenic device, loudspeaker and calculating equipment.The audio frequency play interface of the audiogenic device with The audio receiving interface signal of loudspeaker connects；The audio of the audio input interface for calculating equipment and microphone array to be measured The connection of output interface signal, and the calculating equipment includes aforementioned test device.

When testing microphone array to be measured, the pronunciation end of the pickup end of microphone array to be measured and loudspeaker it is opposite and The center at pickup end and the pronunciation center of loudspeaker are on same level straight line.

In one embodiment, the system also includes the brackets for being used to support microphone array to be measured.Microphone array to be measured When column are installed on the support panel of the bracket, pickup end is protruded compared to the support panel toward loudspeaker direction.

Corresponding with the embodiment of the test method of aforementioned microphone array, the disclosure also provides a kind of microphone array The electronic equipment of test device, the electronic equipment include:

Processor；

Wherein, the step of realizing the test method of aforementioned microphone array when the processor executes described program, comprising:

As shown in figure 8, Fig. 8 is a kind of disclosure test device of microphone array shown according to an exemplary embodiment Electronic equipment structural block diagram.The electronic equipment 500 can be computer, mobile phone, messaging devices, game control Platform processed, the terminal devices such as tablet device.

Referring to Fig. 8, electronic equipment 500 may include following one or more components: processing component 501, memory 502, Power supply module 503, multimedia component 504, audio component 505, the interface 506 of input/output (I/O), sensor module 507, And communication component 508.

The integrated operation of the usual controlling electronic devices 500 of processing component 501, such as with display, call, data are logical Letter, camera operation and record operate associated operation.Processing component 501 may include one or more processors 509 to hold Row instruction, to perform all or part of the steps of the methods described above.In addition, processing component 501 may include one or more moulds Block, convenient for the interaction between processing component 501 and other components.For example, processing component 501 may include multi-media module, with Facilitate the interaction between multimedia component 504 and processing component 501.

Memory 502 is configured as storing various types of data to support the operation in electronic equipment 500.These data Example include any application or method for being operated on electronic equipment 500 instruction, contact data, telephone directory Data, message, picture, video etc..Memory 502 can by any kind of volatibility or non-volatile memory device or it Combination realize, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM) is erasable Except programmable read only memory (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, fastly Flash memory, disk or CD.

Power supply module 503 provides electric power for the various assemblies of electronic equipment 500.Power supply module 503 may include power supply pipe Reason system, one or more power supplys and other generates, managees, and distributes the associated component of electric power with for electronic equipment 500.

Multimedia component 504 includes the screen of one output interface of offer between the electronic equipment 500 and user. The screen may include touch panel (TP), be implemented as touch screen, to receive input signal from the user.Touch panel Including one or more touch sensors to sense the gesture on touch, slide, and touch panel.The touch sensor can be with The boundary of a touch or slide action is not only sensed, but also detects duration associated with the touch or slide operation and pressure Power.In some embodiments, multimedia component 504 includes a front camera and/or rear camera.Work as electronic equipment 500 are in operation mode, and such as in a shooting mode or a video mode, front camera and/or rear camera can receive outside Multi-medium data.Each front camera and rear camera can be a fixed optical lens system or have focal length And optical zoom ability.

Audio component 505 is configured as output and/or input audio signal.For example, audio component 505 includes a Mike Wind (MIC), when electronic equipment 500 is in operation mode, when such as call mode, recording mode, and voice recognition mode, microphone It is configured as receiving external audio signal.The received audio signal can be further stored in memory 502 or via logical Believe that component 508 is sent.In some embodiments, audio component 505 further includes a loudspeaker, is used for output audio signal.

I/O interface 502 provides interface between processing component 501 and peripheral interface module, and above-mentioned peripheral interface module can To be keyboard, click wheel, button etc..These buttons may include, but are not limited to: home button, volume button, start button and lock Determine button.

Sensor module 507 includes one or more sensors, for providing the state of various aspects for electronic equipment 500 Assessment.For example, sensor module 507 can detecte the state that opens/closes of electronic equipment 500, the relative positioning of component, example As the component be electronic equipment 500 display and keypad, sensor module 507 can also detect electronic equipment 500 or The position change of 500 1 components of electronic equipment, the existence or non-existence that user contacts with electronic equipment 500, electronic equipment 500 The temperature change of orientation or acceleration/deceleration and electronic equipment 500.Sensor module 507 may include proximity sensor, be configured For detecting the presence of nearby objects without any physical contact.Sensor module 507 can also include optical sensor, Such as CMOS or ccd image sensor, for being used in imaging applications.In some embodiments, which may be used also To include acceleration transducer, gyro sensor, Magnetic Sensor, pressure sensor, temperature sensor, photoelectric sensor or GPS sensor.

Communication component 508 is configured to facilitate the communication of wired or wireless way between electronic equipment 500 and other equipment. Electronic equipment 500 can access the wireless network based on communication standard, such as WiFi, 2G, 3G or 4G or their combination.One In a exemplary embodiment, communication component 508 via broadcast channel receive broadcast singal from external broadcasting management system or Broadcast related information.In one exemplary embodiment, the communication component 508 further includes near-field communication (NFC) module, to promote Into short range communication.For example, radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wide can be based in NFC module Band (UWB) technology, bluetooth (BT) technology and other technologies are realized.

In the exemplary embodiment, electronic equipment 500 can be by one or more application specific integrated circuit (ASIC), number Word signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), controller, microcontroller, microprocessor or other electron component are realized, for executing the above method.

The function of each unit and the realization process of effect are specifically detailed in the above method corresponding step in above-mentioned electronic equipment Rapid realization process, details are not described herein.

For device embodiment, since it corresponds essentially to embodiment of the method, so related place is referring to method reality Apply the part explanation of example.The apparatus embodiments described above are merely exemplary, wherein described be used as separation unit The unit of explanation may or may not be physically separated, and component shown as a unit can be or can also be with It is not physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to actual The purpose for needing to select some or all of the modules therein to realize disclosure scheme.Those of ordinary skill in the art are not paying Out in the case where creative work, it can understand and implement.

Corresponding with the embodiment of the test method of aforementioned microphone array, the disclosure also provides a kind of computer-readable deposit Storage media is stored thereon with computer program, which realizes the Mike when being executed by the processor 509 of above-mentioned electronic equipment The step of test method of wind array, comprising: receive the audio signal obtained after microphone array is acquired testing audio；

It wherein includes storage medium (the including but not limited to disk of program code that the disclosure, which can be used in one or more, Memory, CD-ROM, optical memory etc.) on the form of computer program product implemented.Computer-usable storage medium packet Permanent and non-permanent, removable and non-removable media is included, can be accomplished by any method or technique information storage.Letter Breath can be computer readable instructions, data structure, the module of program or other data.The example packet of the storage medium of computer Include but be not limited to: phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), Other kinds of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape magnetic disk storage or other magnetic storage devices or any other non-biography Defeated medium, can be used for storage can be accessed by a computing device information.

Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure Its embodiment.The disclosure is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by following Claim is pointed out.

It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by the accompanying claims.

The foregoing is merely the preferred embodiments of the disclosure, not to limit the disclosure, all essences in the disclosure Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of disclosure protection.

Claims

1. a kind of test method of microphone array, which is characterized in that the described method includes:

The audio signal is handled, the single channel for obtaining each microphone specifies the interchannel between parameter and microphone to refer to Determine parameter；

Parameter and the specified parameter of the interchannel is specified to determine the performance of microphone array, and output performance according to the single channel Test result；

Wherein, the single channel specify parameter include: sensitivity level, sensitivity level curve, noise level, total harmonic distortion parameter, Total harmonic distortion curve, signal-to-noise ratio, the tolerance of frequency response, leakproofness parameter and cut ridge parameter；The interchannel specifies parameter It include: frequency response parameter of consistency, time delay parameter of consistency and relevance parameter.

2. the method according to claim 1, wherein the pickup end of the microphone array and the pronunciation of loudspeaker End is opposite and the center at pickup end and the pronunciation center of loudspeaker are on same level straight line；

The testing audio is broadcasted by the pronunciation end of the loudspeaker, and is acquired by the pickup end of the microphone array.

3. obtaining each wheat the method according to claim 1, wherein described handle the audio signal The step of single channel of gram wind specifies the interchannel between parameter and microphone to specify parameter, includes at least one of the following:

When the testing audio is 1kHz, sound pressure level with -2dB is that tolerance is successively reduced to from 0dB default sound pressure level and per adjacent When break time between two groups of signals is the single frequency sinusoidal signal sequence of preset value, each microphone is calculated in each single frequency sinusoidal The sensitivity level of signal；Sensitivity level is generated with sound in the sensitivity level of each single frequency sinusoidal signal according to each microphone respectively It arbitrarily downgrades the curve of variation, obtains the sensitivity level curve of each microphone；

When the testing audio is mute signal or pause plays the testing audio, obtain that each microphone institute is collected to make an uproar The voltage gross energy of acoustical signal；Based on each voltage gross energy, the full frequency band gross energy for obtaining each microphone is calculated separately, it is described complete Frequency range gross energy is the noise level；

The sensitivity level of each microphone and the difference of its noise level are calculated, the signal-to-noise ratio of each microphone is obtained；

When the testing audio is the logarithm swept-frequency signal of 20Hz~20kHz, 0dB, according to the collected audio of each microphone Signal generates frequency response curve；The difference for calculating the maxima and minima of each frequency response curve obtains the frequency response of each microphone Tolerance；

When the testing audio is the white noise signal of 0dB, each microphone collected sound when sound hole is unsealed is calculated First single-frequency point energy of each frequency point of frequency signal, and calculate each microphone collected audio letter when sound hole is sealed Number each frequency point the second single-frequency point energy；It is obtained respectively based on the first single-frequency point energy and the second single-frequency point energy balane The single-frequency point energy difference mean value of microphone, the single-frequency point energy difference mean value are the external leakproofness ginseng in the leakproofness parameter Number；

When the testing audio is the white noise signal of 0dB, according to the collected audio signal of each microphone, every two Mike is calculated Delay inequality between the collected audio signal of wind；The average value for calculating all delay inequalitys obtains the time delay one of microphone array Cause property parameter；

When the testing audio be from the 0dB white noise signal intensity of lasting preset time to sound pressure level with -3dB be tolerance from When the white noise signal sequence that 120dB is gradually decreased, signal waveforms are generated according to the collected audio signal of each microphone；According to Each signal waveforms determine sound pressure level when cut ridge occurs for each microphone collected audio signal, obtain cut ridge parameter.

4. according to the method described in claim 3, it is characterized in that, the single channel specifies parameter further include: frequency range single-frequency point Average energy value；

When the testing audio is mute signal or pause plays the testing audio, further includes:

The working frequency range of each microphone is divided into continuous 3 frequency ranges, calculates separately the collected noise letter of each microphone institute The average energy of each frequency point, obtains the frequency range single-frequency point average energy value of each frequency range of each microphone number in each frequency range.

5. according to the method described in claim 3, obtaining each wheat it is characterized in that, described handle the audio signal The step of single channel of gram wind specifies the interchannel between parameter and microphone to specify parameter, further includes:

According to all frequency response curves, the average value of the corresponding all frequency responses of each frequency point is calculated, the more of each frequency point are obtained Channel frequence responds mean value；

The frequency response of each frequency point of each frequency response curve and the difference of corresponding multi-channel frequency response mean value are calculated, each frequency response is obtained The mean value error of the frequency response of each frequency point of curve, and the mean value error of the frequency response of each microphone is varying with frequency Curve is created in same image, obtains the consistent linearity curve of interchannel frequency response；The consistent linearity curve of the interchannel frequency response is frequency response Parameter of consistency.

6. according to the method described in claim 3, obtaining each wheat it is characterized in that, described handle the audio signal The step of single channel of gram wind specifies the interchannel between parameter and microphone to specify parameter, further includes:

The frequency response of each frequency point of each frequency response curve and the absolute value of the difference of corresponding multi-channel frequency response mean value are calculated, is obtained To the modulus value of the mean value error of the frequency response of each frequency point of each frequency response curve；

The average value for calculating the corresponding all modulus value of each frequency point obtains the modulus value mean value of each frequency point；

All frequency points are in turn divided into continuous 3 frequency ranges by sequence by size, and it is total to calculate separately all modulus value mean values of each frequency range With the quotient with band bandwidth, the frequency response mould mean value of each frequency range is obtained；The frequency response mould mean value is frequency response parameter of consistency.

7. the method according to claim 1, wherein before handling the audio signal, further includes:

When detecting enabled instruction, man-machine interface is shown；The man-machine interface at least shows the single channel and specifies parameter Title, the interchannel specify parameter name, calculate and control with the one-to-one multiple selection controls of each parameter name and parameter Part；

When receive parameter calculate control be triggered caused by instruction when, determined according to the selection control being triggered current desired The parameter of calculating.

8. a kind of test device of microphone array characterized by comprising

Processing module is configured as: being handled the audio signal, the single channel for obtaining each microphone specifies parameter and wheat Interchannel between gram wind specifies parameter；

Output module is configured as: specifying parameter and the interchannel that parameter is specified to determine microphone array according to the single channel The performance of column, and output performance test result；

Wherein, it includes: sensitivity level, sensitivity level curve, total harmonic distortion parameter, the mistake of total harmonic wave that the single channel, which specifies parameter, True curve, noise level, signal-to-noise ratio, the tolerance of frequency response, leakproofness parameter and cut ridge parameter；The interchannel specifies parameter packet It includes: frequency response parameter of consistency, time delay parameter of consistency and relevance parameter.

9. device according to claim 8, which is characterized in that the processing module includes at least one of: sensitivity Curve acquisition module, noise level obtain module, signal-to-noise ratio computation module, frequency response tolerance acquisition module, external leakproofness parameter and obtain Modulus block, time delay consistency obtain module and cut ridge parameter acquisition module；

The sensitivity curve obtains module

Sensitivity level acquisition submodule, is configured as: when the testing audio is 1kHz, sound pressure level with -2dB is tolerance from 0dB Successively being reduced to the break time between default sound pressure level and every two adjacent groups signal is the single frequency sinusoidal signal sequence of preset value When, each microphone is calculated in the sensitivity level of each single frequency sinusoidal signal；

Sensitivity level curve acquisition submodule, is configured as: respectively according to each microphone in the sensitive of each single frequency sinusoidal signal Grade is spent, the curve that sensitivity level changes with sound pressure level is generated, obtains the sensitivity level curve of each microphone；

The noise level obtains module

Voltage gross energy acquisition submodule, is configured as: when the testing audio is that mute signal or pause play the test When audio, obtain each microphone collected noise signal voltage gross energy；

Noise level computational submodule, is configured as: being based on each voltage gross energy, the full frequency band for calculating separately to obtain each microphone is total Energy, the full frequency band gross energy are the noise level；

The signal-to-noise ratio computation module is configured as: being calculated the sensitivity level of each microphone and the difference of its noise level, is obtained each wheat The signal-to-noise ratio of gram wind；

The frequency response tolerance obtains module

Frequency response curve generates submodule, is configured as: when the logarithm swept-frequency signal that the testing audio is 20Hz~20kHz, 0dB When, frequency response curve is generated according to the collected audio signal of each microphone；

Frequency response tolerance computational submodule, is configured as: calculating the difference of the maxima and minima of each frequency response curve, obtains each Mike The tolerance of the frequency response of wind；

Leakproofness parameter acquisition module includes: outside described

Energy balane submodule, is configured as: when the testing audio is the white noise signal of 0dB, calculating each microphone and is receiving First single-frequency point energy of each frequency point of collected audio signal when sound hole is unsealed, and each microphone is calculated in radio reception Second single-frequency point energy of hole each frequency point of collected audio signal when being sealed；

Energy difference mean value computation submodule, is configured as: being based on the first single-frequency point energy and the second single-frequency point energy balane The single-frequency point energy difference mean value of each microphone is obtained, the single-frequency point energy difference mean value is that the outside in the leakproofness parameter is close Envelope property parameter；

The time delay consistency obtains module

Delay inequality computational submodule, is configured as: when the testing audio is the white noise signal of 0dB, according to each Mike's elegance The audio signal collected calculates the delay inequality between every collected audio signal of two microphones；

Time delay parameter of consistency computational submodule, is configured as: calculating the average value of all delay inequalitys, obtains microphone array Time delay parameter of consistency；

The cut ridge parameter acquisition module includes:

Waveform diagram generates submodule, is configured as: when the testing audio is the 0dB white noise signal intensity from lasting preset time When to sound pressure level using -3dB as the white noise signal sequence that tolerance is gradually decreased from 120dB, according to the collected audio of each microphone Signal generates signal waveforms；

Cut ridge parameter acquisition submodule, is configured as: determining the collected audio signal of each microphone according to each signal waveforms Sound pressure level when cut ridge occurs, obtains cut ridge parameter.

10. device according to claim 9, which is characterized in that the single channel specifies parameter further include: frequency range single-frequency point Average energy value；

The processing module further include:

Frequency range single-frequency point average energy value computing module, is configured as: when the testing audio plays institute for mute signal or pause When stating testing audio, the working frequency range of each microphone is divided into continuous 3 frequency ranges, each microphone is calculated separately and is collected Noise signal each frequency point in each frequency range average energy, obtain the frequency range single-frequency point energy of each frequency range of each microphone Mean value.

11. device according to claim 9, which is characterized in that the processing module further includes that frequency response consistency obtains mould Block；The frequency response consistency obtains module

Interchannel frequency response mean value computation submodule, is configured as: according to all frequency response curves, it is corresponding all to calculate each frequency point The average value of frequency response obtains the multi-channel frequency response mean value of each frequency point；

Frequency response parameter of consistency acquisition submodule, is configured as: calculating the frequency response and correspondence of each frequency point of each frequency response curve Multi-channel frequency response mean value difference, obtain the mean value error of the frequency response of each frequency point of each frequency response curve, and by each wheat The mean value error curve varying with frequency of the frequency response of gram wind is created in same image, obtains interchannel frequency response consistency Curve；The consistent linearity curve of the interchannel frequency response is frequency response parameter of consistency.

12. device according to claim 9, which is characterized in that the processing module further includes that frequency response consistency obtains mould Block；The frequency response consistency obtains module

Frequency response mean value error magnitude calculation submodule, is configured as: calculating the frequency response of each frequency point of each frequency response curve and right The absolute value of the difference for the multi-channel frequency response mean value answered obtains the mean value error of the frequency response of each frequency point of each frequency response curve Modulus value；

Single-frequency point modulus value mean value computation submodule, is configured as: calculating the average value of the corresponding all modulus value of each frequency point, obtains The modulus value mean value of each frequency point；

Frequency response parameter of consistency computational submodule, is configured as: all frequency points are in turn divided into continuous 3 by sequence by size Frequency range calculates separately the quotient of each frequency range all modulus value mean value summations and band bandwidth, obtains the frequency response mould mean value of each frequency range；It is described Frequency response mould mean value is frequency response parameter of consistency.

13. device according to claim 8, which is characterized in that further include display module and parameter determination module:

The display module, is configured as: when detecting enabled instruction, showing man-machine interface；The man-machine interface is at least aobvious It is shown with the specified parameter name of the single channel, the interchannel specifies parameter name, multiple correspondingly with each parameter name Control and parameter is selected to calculate control；

The parameter determination module, is configured as: when receive parameter calculate control be triggered caused by instruction when, according to quilt The selection control of triggering determines the parameter of current desired calculating, and is sent to the processing module；

The processing module includes:

Specified parameter computation module, is configured as: according to the parameter for the current desired calculating that the parameter determination module is sent To the Audio Signal Processing, obtains and export required parameter.

14. a kind of test macro of microphone array, which is characterized in that including audiogenic device, loudspeaker and calculate equipment；It is described The audio frequency play interface of audiogenic device and the audio receiving interface signal of loudspeaker connect；The audio input for calculating equipment connects Mouth is connect with the audio output interface signal of microphone array to be measured, and the calculating equipment includes that claim 8~13 is any Device described in；

When testing microphone array to be measured, the pronunciation end of the pickup end of microphone array to be measured and loudspeaker is opposite and pickup end Center and the pronunciation center of loudspeaker be on same level straight line.

15. system according to claim 14, which is characterized in that further include the branch for being used to support microphone array to be measured Frame；

When microphone array to be measured is installed on the support panel of the bracket, pickup end is past to raise compared to the support panel Sound device direction protrusion.

16. a kind of electronic equipment characterized by comprising

Processor；

Wherein, the step of any one of claim 1~7 the method is realized when the processor executes described program.

17. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that described program is processed The step of any one of claim 1~7 the method is realized when device executes.