CN110830902A

CN110830902A - Testing device of microphone array

Info

Publication number: CN110830902A
Application number: CN201810893812.1A
Authority: CN
Inventors: 丛东升
Original assignee: iFlytek Co Ltd; Beijing Jingdong Shangke Information Technology Co Ltd
Current assignee: iFlytek Co Ltd; Beijing Jingdong Shangke Information Technology Co Ltd
Priority date: 2018-08-07
Filing date: 2018-08-07
Publication date: 2020-02-21

Abstract

The utility model provides a testing arrangement of microphone array, including audio output device, cavity and fixing device, wherein: the audio output device and the fixing device are respectively arranged at two opposite ends of the cavity; the fixing device is used for fixing the tested microphone array; the cavity is used for forming a closed space between the audio output device and the tested microphone array so as to collect the test audio output by the audio output device.

Description

Testing device of microphone array

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a test apparatus for a microphone array.

Background

The intelligent sound box is increasingly popularized, and the key component in the intelligent sound box is a microphone array, namely an array formed by a plurality of microphones, so that the noise reduction effect of the sound box can be improved, and the recognition effect of a user voice instruction is improved. In the production process of the circuit board, the arrays need to be subjected to processes of surface mounting, welding and the like, damage and performance reduction of one or more microphones can be avoided, and the performance of all the microphones in the arrays is ensured to be consistent in order to achieve the best identification effect, so that each microphone array needs to be subjected to strict testing before being assembled into a whole machine.

In the course of implementing the disclosed concept, the inventors found that there are at least the following problems in the prior art: because the sound that the test audio frequency was broadcast to loudspeaker is scattered, when loudspeaker and microphone array board's distance was close, the sound that microphone in the middle of on the microphone array board received is big, the sound that the edge was received is little, make the audio data difference that edge and middle microphone received great, lack the uniformity, consequently, set up loudspeaker and microphone array board's distance between 0.5m and 1m among the current testing arrangement, although guaranteed the uniformity, it is too big to cause the testing arrangement volume, the cost of manufacture is high, workman's operation difficulty is big, be unfavorable for improving efficiency of software testing.

Disclosure of Invention

In view of this, the present disclosure provides a testing apparatus for a microphone array, including an audio output device, a cavity and a fixing device, wherein: the audio output device and the fixing device are respectively arranged at two opposite ends of the cavity; the fixing device is used for fixing the tested microphone array; the cavity is used for forming a closed space between the audio output device and the tested microphone array so as to collect the test audio output by the audio output device.

According to an embodiment of the present disclosure, the cavity is tapered, with a first end having a smaller cross-sectional area than a second end; the audio output device is arranged at the first end of the cavity, and an audio output port of the audio output device faces the second end of the cavity; the fixing device is arranged at the second end of the cavity.

According to an embodiment of the present disclosure, the test device further comprises a calibration microphone, wherein: the calibration microphone is used for calibrating the test audio in a debugging phase, and/or the calibration microphone is used for monitoring noise to judge whether the surrounding environment can carry out the test of the microphone array.

According to the embodiment of the disclosure, the testing device further comprises a sound insulation box, wherein the audio output device, the cavity and the fixing device are arranged in the sound insulation box and used for reducing noise of a testing environment.

According to an embodiment of the present disclosure, the soundproof box includes a metal case, and a soundproof layer is provided inside the metal case; and/or a sound absorption layer is arranged in the sound insulation box; and/or the bottom of the sound insulation box is provided with a shock pad.

According to an embodiment of the present disclosure, the testing apparatus further includes an audio analyzer, wherein: in a debugging stage, the audio analyzer is connected with the calibration microphone and is used for collecting audio data received by the calibration microphone and calibrating the test audio according to the audio data; and/or in a testing stage, the audio analyzer is used for acquiring audio data received by a plurality of microphones of a tested microphone array and analyzing the audio data to obtain testing data of the tested microphone array.

According to the embodiment of the present disclosure, the testing apparatus further includes a main board and a processing and display apparatus, wherein: the main board is connected with the tested microphone array and is used for acquiring audio data received by a plurality of microphones of the tested microphone array; in the testing stage, the processing and display device is used for acquiring the audio data from the mainboard, obtaining and displaying the test data of the tested microphone array by combining with the analysis of the audio analyzer, and judging whether the tested microphone array passes the test according to the test data; and in the debugging stage, the processing and display device is also used for adjusting the parameters of the test audio by combining the audio analyzer according to the audio data received by the calibration microphone.

According to the embodiment of the disclosure, the audio analyzer is connected with the audio output device; the processing and display device is also used for controlling the audio analyzer to drive the audio output device to play test audio when the test stage begins, and controlling the mainboard to drive the plurality of microphones of the tested microphone array to start recording.

According to this disclosed embodiment, testing arrangement still includes microphone anchor clamps, set up in fixing device is last, wherein: the microphone clamp is used for fixing the tested microphone array in a testing stage, and/or the microphone clamp is used for fixing the calibration microphone in a debugging stage.

According to an embodiment of the present disclosure, the audio output device includes an artificial mouth.

According to the embodiment of the present disclosure, the problem of lack of uniformity of the plurality of microphones on the microphone array and the problem of large volume of the test device can be at least partially alleviated, and therefore, the technical effect of ensuring uniformity of audio data received by the plurality of microphones without increasing the volume of the device can be achieved.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:

fig. 1 schematically illustrates an exemplary application scenario of a testing arrangement of a microphone array according to an embodiment of the present disclosure;

fig. 2 schematically illustrates a structural schematic diagram of a microphone array testing apparatus according to an embodiment of the present disclosure;

fig. 3 schematically illustrates a perspective structure diagram of a microphone array testing apparatus according to an embodiment of the present disclosure;

FIG. 4 schematically illustrates a schematic diagram of a manner of sound propagation in accordance with an embodiment of the present disclosure;

FIG. 5 schematically illustrates a testing apparatus having a sound isolation box according to an embodiment of the present disclosure;

FIG. 6 schematically illustrates a structural schematic of a sound isolation box according to an embodiment of the present disclosure;

fig. 7 schematically shows a structural schematic diagram of a testing device according to another embodiment of the present disclosure.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, operations, and/or components, but do not preclude the presence or addition of one or more other features, operations, or components.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.

Where a convention analogous to "at least one of A, B and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a device having at least one of A, B and C" would include but not be limited to devices having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). Where a convention analogous to "A, B or at least one of C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a device having at least one of A, B or C" would include but not be limited to devices having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "a or B" should be understood to include the possibility of "a" or "B", or "a and B".

The embodiment of the present disclosure provides a testing device of a microphone array, including an audio output device, a cavity and a fixing device, wherein: the audio output device and the fixing device are respectively arranged at two opposite ends of the cavity; the fixing device is used for fixing the tested microphone array; the cavity is used for forming a closed space between the audio output device and the tested microphone array so as to collect the test audio output by the audio output device.

According to the testing device for the microphone array, the sealing cavity is arranged between the testing sound source and the microphone array, the sound emitted by the testing sound source is collected, the sound enters the microphone through the reflection of the wall surface of the cavity, the energy loss caused by edge sound scattering is reduced, the problem that a plurality of microphones on the microphone array lack consistency and the problem that the testing equipment is large in size can be at least partially relieved, and therefore the technical effect that the consistency of audio data received by the plurality of microphones can be guaranteed on the premise that the equipment size is not increased can be achieved.

Fig. 1 schematically shows an exemplary application scenario of a testing arrangement of a microphone array according to an embodiment of the present disclosure.

As shown in fig. 1, the smart sound box 1 generally includes a microphone array board 100, the microphone array board 100 is installed with a plurality of microphones arranged in a regular array, the microphone arrays on different sound boxes are in different forms, and the microphone arrays can improve the recognition effect of the user voice instruction. However, due to the complex process, the phenomena of component damage, performance failure and the like inevitably occur in the production process, and therefore each microphone array needs to be strictly tested before being assembled into a complete machine.

Because the sound that the test audio frequency was broadcast to loudspeaker is scattered, when loudspeaker and microphone array board's distance was close, the sound that microphone in the middle of on the microphone array board received is big, the sound that the edge was received is little, make the audio data difference that edge and middle microphone received great, lack the uniformity, consequently, set up loudspeaker and microphone array board's distance between 0.5m and 1m among the current testing arrangement, although guaranteed the uniformity, it is too big to cause the testing arrangement volume, the cost of manufacture is high, workman's operation difficulty is big, be unfavorable for improving efficiency of software testing.

The testing device of the microphone array provided by the embodiment of the disclosure can be used for testing the performance of the microphone array, the microphone array board 100 to be tested is fixed in the testing device, the testing audio output by the audio output device is utilized to transmit sound to the microphone through the cavity, and then the audio data received by the microphones on the microphone array board 100 is collected, so that the performance of the microphone array is analyzed according to the audio data. The sealed cavity is arranged between the test sound source and the microphone array, so that the sound emitted by the sound source can be collected, the sound diffusion is reduced, the sound enters the microphone through the reflection of the wall surface of the cavity, the energy loss caused by edge sound scattering is reduced, and the consistency of receiving audio data by the microphones is ensured.

It is understood that the application scenario in fig. 1 is only an example, and the testing apparatus of the microphone array may be applied to other scenarios that require performance testing of the audio acquisition apparatus besides the microphone array of the smart speaker.

Fig. 2 schematically shows a structural schematic diagram of a microphone array testing apparatus 2 according to an embodiment of the present disclosure.

Fig. 3 schematically shows a perspective structure diagram of the microphone array testing device 2 according to an embodiment of the present disclosure.

As shown in fig. 2 and 3, the testing device 2 of the microphone array includes an audio output device 210, a cavity 220, and a fixing device 230, wherein: the audio output device 210 and the fixing device 230 are respectively disposed at two opposite ends of the cavity 220; the fixing device 230 is used for fixing the tested microphone array 3; the cavity 220 is used to form a sealed space between the audio output device 210 and the tested microphone array 3 to collect the test audio output by the audio output device 210.

Specifically, the microphones are acoustic sensors, and in order to increase the voice recognition effect of the smart sound box, one microphone is not usually adopted for performing voice recognition alone, but a certain number of microphones are adopted to form a microphone array according to a certain arrangement rule, so that the spatial characteristics of a sound field can be sampled, and functions of sound source side direction, noise suppression, reverberation removal and the like can be further realized. The microphone arrays of different sound boxes are arranged in different forms, generally in the forms of line, ring, sphere and the like, and the number of the microphones can be from 2 to hundreds.

The testing device 2 of the microphone array is used for testing the performance of the microphone array, including performance parameters such as frequency response, sensitivity, signal-to-noise ratio, distortion degree and the like of each microphone in the microphone array.

The cavity 220 is a hollow structure and includes a housing, a channel for transmitting sound is provided inside the housing, and two ends of the channel are a first end and a second end which are opposite and communicated with each other. The shape of the shell can be cylindrical, conical or polygonal, and the cone can be conical, triangular conical or polygonal; the shell can also be formed by splicing a plurality of same or different structures, for example, the shell is divided into two sections, one section is cylindrical, the other section is conical, for example, one section is conical, and the other end is conical; the housing profile may also be irregular. The shape of the internal channel of the cavity 220 may be the same as the shape of the housing, i.e. the housing of different parts has the same thickness, and furthermore, the shape of the internal channel of the cavity 220 may be different from the shape of the housing.

The audio output device 210 is used for playing the test audio, and the audio output device 210 may comprise, for example, a speaker, i.e., a loudspeaker.

According to an embodiment of the present disclosure, the audio output device 210 may include an artificial mouth.

The artificial mouth is also called as artificial mouth, is a sound source for simulating the sound production characteristics of a human, can be formed by mounting a small loudspeaker on a baffle plate with a special shape, and is basically the same as the sound dispersion mode and the frequency response of the human and used for simulating the human to speak in a test.

The audio output device 210 is disposed at one end, for example, a first end, of the cavity 220, and the audio output device 210 has an audio output port 211 facing the sound channel inside the cavity 220.

The securing device 230 may be a structure or device that secures the microphone array plate in any manner at the other end of the cavity 200, which may be, for example, the second end. In the disclosed embodiment, the fixing device 230 may be a fixing plate disposed at the second end of the cavity 220. In other embodiments, the fixing device 230 may also be a support rod, a support frame, or a snap structure such as a buckle disposed on the end surface of the housing, or in special cases, the microphone array board may also be directly disposed at the second end of the cavity 220, that is, the edge of the housing at the second end is used as a support, in which case, the end surface of the second end of the housing is the fixing device 230.

The microphone array 3 is usually mounted on a plate, called a microphone array plate, and after the microphone array plate is fixed on the fixing device 230, the sound receiving hole of the microphone faces the sound channel inside the cavity 220, i.e. faces the audio output device 210.

The cavity 220 is used to form a sealed space between the audio output device 210 and the microphone array 3 to be tested, and the sealed space is a space that can gather sound to some extent and prevent sound from spreading, and does not necessarily mean a completely sealed space.

According to the embodiment of the disclosure, the testing device of the microphone array is provided with the sealing cavity between the testing sound source and the microphone array, collects the sound emitted by the sound source, enables the sound to enter the microphone through the reflection of the wall surface of the cavity, reduces the energy loss caused by edge sound scattering, and can ensure the consistency of the sound received by the plurality of microphones when the distance between the sound source and the microphone array is short. Due to the design of the cavity, the microphone array is better in consistency, the threshold value for judging whether the standard is reached can be set to be narrow, the microphone performance is prevented from being influenced by the error of the testing equipment, and the identification and positioning accuracy is improved.

According to an embodiment of the present disclosure, the cavity 220 is tapered with a first end having a smaller cross-sectional area than a second end; the audio output device 210 is disposed at a first end of the cavity 220, and the audio output port 211 thereof faces a second end of the cavity 220; the fixing device 230 is disposed at the second end of the cavity 220.

Fig. 4 schematically shows a schematic diagram of a sound propagation manner according to an embodiment of the present disclosure.

As shown in fig. 4, the sound emitted from the audio output device 210 is scattered, and a part of the scattered sound is directly transmitted to the plurality of microphones on the microphone array board, and a part of the scattered sound is transmitted to the microphones through one or more reflections.

The reflection effect of each cavity shape is different, and through a plurality of tests, under the same height, the lower conical cavity shown in fig. 4 can achieve a better sound transmission effect compared with an upper conical cavity and a straight cylindrical cavity, and parameters such as the uniformity and the loudness of sound received by each microphone are better. Under the condition that the microphone is arranged at a position higher than the audio output device, the conical cavity is inverted and is in a lower conical shape, and the section area of the conical cavity is gradually increased from bottom to top.

The cavity can be made of hard materials, sound emitted by the audio output device 210 hits the cavity wall and is reflected into the microphone, and energy loss in the process is small.

FIG. 5 schematically shows a testing apparatus having a sound isolation box according to an embodiment of the present disclosure.

As shown in fig. 5, according to an embodiment of the present disclosure, the testing device 2 may further include an acoustic isolation box 240, and the audio output device 210, the cavity 220, and the fixture 230 are disposed in the acoustic isolation box 240 for reducing noise of the testing environment.

Specifically, because the test of the microphone array is usually performed in a factory environment, which is noisy and has large noise, in the existing test technology, a great deal of noise is often mixed in the recorded audio of the tested microphone, so that the signal-to-noise ratio of the microphone cannot be tested, and other indexes such as frequency response and harmonic distortion test can be influenced; the yield can only be guaranteed by widening the test threshold, so that the whole test is rough and the quality is reduced.

According to the embodiment of the disclosure, the test component is arranged in the sound insulation box, factory noise can be effectively isolated, the mute amount of the sound insulation box is △ & gt 40dB, so that when the factory noise environment is about 70dB, the interior of the sound insulation box is guaranteed to reach below 30dB, general microphone test can be performed, the signal-to-noise ratio of the microphone can be tested, other test parameters can be guaranteed to be stable and reliable, the test result is more accurate, and the quality and the awakening effect of the microphone array are improved.

FIG. 6 schematically shows a structural schematic of a sound isolation box according to an embodiment of the present disclosure.

As shown in fig. 6, according to an embodiment of the present disclosure, the soundproof case 240 includes a metal case 241, and a soundproof layer 242 is provided inside the metal case 241; and/or a sound absorption layer 243 is arranged inside the sound insulation box; and/or the bottom of the sound isolation box is provided with a crash pad 244.

Specifically, the soundproof case 240 may use a multi-layer design, for example, the outermost layer uses a metal shell, and the soundproof layer 242 is built with high-density soundproof cotton and felt, etc. to achieve a soundproof effect, and the innermost layer uses sound-absorbing cotton as a sound-absorbing layer to prevent sound from being reflected on the case. Meanwhile, the bottom of the sound insulation box body is made of hard sponge or rubber and the like to be connected with the metal support as the shockproof pad 243, so that the vibration of the ground of a factory can not be conducted into the box body, the signal-to-noise ratio parameter of the microphone can be well tested only in the box body in a noise environment below 30dB, the parameter is necessary for remote awakening, and the whole effect can be influenced if the microphone with a problem in the array is too large in bottom noise. Therefore, in order to test the noise of the microphone, the noise of the mute box is less than that of the microphone.

The sound insulation box also comprises a sealing door used for taking and placing the components in the box body.

As shown in fig. 7, according to an embodiment of the present disclosure, the testing device 2 further comprises a calibration microphone 250, wherein: the calibration microphone 250 is used to calibrate the test audio during the debug phase; and/or calibrating the microphone 250 for monitoring noise to determine whether the surrounding environment is capable of testing the microphone array.

Specifically, the testing process may include a debugging phase in which test audio for subsequent testing is adjusted using the calibration microphone 250 and a testing phase in which the audio output device plays the pre-adjusted test audio and collects and analyzes audio data received by the microphone array.

The calibration microphone 250 may be a well-behaved microphone that is used as feedback for the audio output device during the commissioning phase. In the debugging stage, instead of fixing the microphone array to be tested, the calibration microphones 250 are sequentially fixed at corresponding positions of a plurality of microphones to be tested, and the audio output device 210 is used to play a test audio, which can be performed several times, each time the calibration microphone 250 is fixed at a position of one of the microphones, parameters of the audio received by the microphone at the current position are tested, and then the calibration microphone is moved to a position of another microphone, and the audio quality at the position of each microphone in the microphone array is tested one by one. The debugging process may, for example, test whether the loudness at different positions in a plane is consistent, whether distortion is present, whether there is reverberation, etc., and calibrate the test audio according to the result.

In addition, before testing or debugging, the calibration microphone 250 may be used to monitor information such as noise inside the case, and then a machine or a worker may be used to determine whether the internal environment is suitable for testing, and when the calibration microphone 250 is used to monitor noise inside the case, it may be disposed outside the cavity 220.

According to the embodiment of the disclosure, the calibration microphone is used for calibrating the test audio in advance, so that the playing quality of the test audio can be improved, the consistency of sound receiving of the microphone array is further ensured, and the test result is more accurate. In addition, the calibration microphone may be used to monitor ambient noise to determine if it is appropriate to perform the test.

According to an embodiment of the present disclosure, the testing device 2 further includes a microphone clamp disposed on the fixing device 230, wherein: the microphone clamp is used to hold the microphone array 3 under test during the test phase and/or the microphone clamp is used to hold the calibration microphone 250 during the commissioning phase.

In particular, the fixing device 230 is provided with a microphone clamp, and the microphone clamp can be used for fixing a microphone array in a testing stage, such as fixing a microphone array plate or fixing a plurality of microphones individually. In a commissioning phase, a microphone clamp may be used to secure the calibration microphone.

According to an embodiment of the present disclosure, the testing device 2 further comprises an audio analyzer 260, wherein: in the debugging stage, the audio analyzer 260 is connected to the calibration microphone 250, and is configured to collect audio data received by the calibration microphone 250 and calibrate the test audio according to the audio data; and/or in the testing stage, the audio analyzer 260 is configured to obtain audio data received by a plurality of microphones of the tested microphone array 3, and analyze the audio data to obtain test data of the tested microphone array 3.

Specifically, the audio analyzer 260 is an apparatus for analyzing the performance of the audio signal, and may analyze common indicators of audio and feed back the result.

The audio analyzer 260 may be disposed outside the soundproof case 240, and the calibration microphone 250 is connected through a connection line. In the debugging stage, the calibration microphone 250 is sequentially fixed at corresponding positions of a plurality of microphones to be tested, and transmits the received audio data to the audio analyzer through a connecting line, and the audio analyzer is used for analyzing the audio data and calibrating the test audio. The audio analyzer 260 is directly or indirectly connected to the microphone array 3, and in the testing stage, the audio analyzer can acquire and analyze audio data received by the microphone array to obtain the quality of the microphone array.

According to an embodiment of the present disclosure, the testing device 2 further comprises a main board 270 and a processing and display device 280, wherein: the main board 270 is connected to the measured microphone array 3, and is configured to obtain audio data received by a plurality of microphones of the measured microphone array 3; in the testing stage, the processing and display device 280 is configured to obtain audio data from the motherboard 270, obtain and display test data of the tested microphone array 3 by combining with the analysis of the audio analyzer 260, and determine whether the tested microphone array 3 passes the test according to the test data; and in the debugging phase, the processing and display device 280 is further configured to adjust parameters of the test audio according to the audio data received by the calibration microphone 250 in combination with the audio analyzer 260.

Specifically, mainboard 270 can be a signal acquisition board, can drive the microphone array and come the recording, and the microphone array board can link to each other with the mainboard through the spring needle, and both are fixed on fixing device, only change the microphone array board during the test, or change single microphone.

The processing and display device 280 may be a computer, which is disposed outside the soundproof box, and in which a dedicated software matching with the audio analyzer 260 is installed, and the analysis and processing of the audio data in the debugging stage and the testing stage may be completed by using the software of the audio analyzer and the computer, and the display of the computer may also be used to display the test and processing results.

According to an embodiment of the present disclosure, the audio analyzer 260 is connected to the audio output device 210;

the processing and display device 280 is further configured to control the audio analyzer 260 to drive the audio output device 210 to play the test audio at the beginning of the test phase, and control the main board 270 to drive the plurality of microphones of the microphone array 3 to start recording.

Specifically, each time the computer starts a test, the audio analyzer 260 is driven, the audio analyzer sends a test signal to the audio output device 210, so that the audio output device plays a test audio, the computer simultaneously sends a signal to the main board 270, the main board 270 drives the microphone array to start recording, the microphones on the microphone array board receive sound, the main board 270 is used for recording, the recorded audio data file is stored in the main board 270 to wait for the computer to capture, the computer is provided with special software matched with the audio analyzer for adjusting parameters and feeding back results, the computer reads the data stored in the main board 270, the data is split and sent to the audio analyzer 260 for analysis, the signal-to-noise ratio, the distortion degree and other parameters are obtained for multiple times, the results are displayed on the computer after the analysis is finished, and whether the test passes or not is automatically judged according to preset threshold parameters.

According to the embodiment of the disclosure, the data processing system uses the professional audio analyzer to analyze data, the test result is accurate, and the debugging is more flexible in cooperation with a computer terminal.

Those skilled in the art will appreciate that various combinations and/or combinations of features recited in the various embodiments and/or claims of the present disclosure can be made, even if such combinations or combinations are not expressly recited in the present disclosure. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present disclosure may be made without departing from the spirit or teaching of the present disclosure. All such combinations and/or associations are within the scope of the present disclosure.

The embodiments of the present disclosure have been described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described separately above, this does not mean that the measures in the embodiments cannot be used in advantageous combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the present disclosure, and such alternatives and modifications are intended to be within the scope of the present disclosure.

Claims

1. A testing device for a microphone array comprising an audio output device (210), a cavity (220) and a fixture (230), wherein:

the audio output device (210) and the fixing device (230) are respectively arranged at two opposite ends of the cavity (220);

the fixing device (230) is used for fixing the tested microphone array;

the cavity (220) is used for forming a closed space between the audio output device (210) and the tested microphone array so as to gather the test audio output by the audio output device (210).

2. The test apparatus of the microphone array of claim 1, wherein:

the cavity (220) is conical, and the cross-sectional area of the first end of the cavity is smaller than that of the second end of the cavity;

the audio output device (210) is arranged at the first end of the cavity (220), and the audio output port (211) faces the second end of the cavity (220);

the fixing device (230) is arranged at the second end of the cavity (220).

3. The testing arrangement of a microphone array according to claim 1, further comprising a calibration microphone (250), wherein:

the calibration microphone (250) is used for calibrating the test audio in a commissioning phase, and/or

The calibration microphone (250) is used to monitor noise to determine whether the surrounding environment is capable of testing the microphone array.

4. The test device of a microphone array according to claim 1, further comprising a soundproof case (240), the audio output device (210), the cavity (220), and the fixing device (230) being disposed in the soundproof case (240) for reducing noise of a test environment.

5. The test apparatus of the microphone array of claim 4, wherein:

the soundproof box (240) comprises a metal shell (241), and a soundproof layer (242) is arranged in the metal shell (241); and/or

A sound absorption layer (243) is arranged in the sound insulation box (240); and/or

And a shockproof pad (244) is arranged at the bottom of the sound insulation box (240).

6. A test arrangement for a microphone array according to claim 3, further comprising an audio analyzer (260), wherein:

in a debugging stage, the audio analyzer (260) is connected with the calibration microphone (250) and used for collecting audio data received by the calibration microphone (250) and calibrating the test audio according to the audio data; and/or

In the testing stage, the audio analyzer (260) is used for acquiring audio data received by a plurality of microphones of a tested microphone array and analyzing the audio data to obtain test data of the tested microphone array.

7. The testing device of a microphone array according to claim 6, further comprising a main board (270) and a processing and display device (280), wherein:

the main board (270) is connected with the tested microphone array and used for acquiring audio data received by a plurality of microphones of the tested microphone array;

in the testing stage, the processing and display device (280) is used for acquiring the audio data from a main board (270), analyzing the audio data by combining the audio analyzer (260) to obtain the testing data of the tested microphone array and displaying the testing data, and judging whether the tested microphone array passes the testing according to the testing data; and

in a debugging phase, the processing and display device (280) is also used for adjusting the parameters of the test audio in combination with the audio analyzer (260) according to the audio data received by the calibration microphone (250).

8. The test apparatus of the microphone array of claim 6, wherein:

the audio analyzer (260) is connected with the audio output device (210);

the processing and display device (280) is also used for controlling the audio analyzer (260) to drive the audio output device (210) to play test audio at the beginning of a test stage, and controlling the main board (270) to drive a plurality of microphones of the tested microphone array to start recording.

9. A test device of a microphone array according to claim 3, further comprising a microphone clamp provided on the fixture (230), wherein:

the microphone clamp is used for fixing the tested microphone array in a test stage, and/or

The microphone clamp is used for fixing the calibration microphone (250) in a commissioning phase.

10. A testing arrangement of a microphone array according to claim 1, wherein the audio output device (210) comprises an artificial mouth.