CN110691314B - Linear microphone array performance test method and clamp - Google Patents
Linear microphone array performance test method and clamp Download PDFInfo
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- CN110691314B CN110691314B CN201911004757.7A CN201911004757A CN110691314B CN 110691314 B CN110691314 B CN 110691314B CN 201911004757 A CN201911004757 A CN 201911004757A CN 110691314 B CN110691314 B CN 110691314B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
Abstract
The application discloses a method for testing the performance of a linear microphone array, which comprises the following steps: controlling to play preset audio, and acquiring audio data through a linear microphone array; determining a microphone channel signal strength value and an echo cancellation channel signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data; when the signal intensity value of the microphone channel is judged to be within a first standard range and the signal intensity value of the echo cancellation channel is judged to be within a second standard range, determining that the audio data collected by the nth microphone is normal; otherwise, determining that the audio data collected by the nth microphone is abnormal. The performance of the linear microphone array is tested by playing the preset audio, and whether the audio data collected by the current microphone is normal or not is determined by judging whether the signal intensity value of the microphone and the loop signal are abnormal or not, so that the accuracy of the performance test is improved.
Description
Technical Field
The application relates to the technical field of microphone performance testing, in particular to a linear microphone array performance testing method and a clamp.
Background
The method and the device for testing the microphone array in the prior art have the following two types:
1. the clamp is used for arranging the standard microphone and the microphone of the terminal to be tested, so that the positions of the standard microphone and the microphone of the terminal to be tested are close to each other and keep synchronous movement, and the quality of the microphone of the terminal to be tested is judged by comparing data collected by the terminal to be tested and the standard microphone through manual mouth sound reproduction.
2. The multilayer barrier is used for isolating the external noise interference of the clamp and inhibiting the influence of the vibration of the sound production device in the clamp on the performance of the microphone to be tested.
However, these methods have at least the following disadvantages:
the requirement on a testing device is high, a corresponding manual mouth, a standard microphone and a multi-layer sound insulation device for a clamp need to be configured, and the mass production of products cannot meet the standard and the corresponding supporting equipment is too many to be complete.
Secondly, the testing operation process of workers is too complex, so that actual mass production is difficult to have steady-state actual operation performance, and the overall testing cost is inevitably increased steeply.
And thirdly, the redundancy of external noise is not enough, and a relatively quiet environment or multiple devices for sound insulation are needed.
Disclosure of Invention
The embodiment of the application provides a method and a clamp for testing the performance of a linear microphone array, which are used for solving at least one of the technical problems.
In a first aspect, an embodiment of the present application provides a method for testing performance of a linear microphone array, where the linear microphone array includes a plurality of microphones, the method includes:
controlling to play preset audio, and acquiring audio data through the linear microphone array;
determining a microphone channel signal strength value and an echo cancellation channel signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data;
when the signal intensity value of the microphone channel is judged not to be in a first standard range, determining that the nth microphone is abnormal;
when the echo cancellation channel signal intensity value is judged not to be within a second standard range, judging that a loop electric signal of the linear microphone array is abnormal;
and when the signal intensity value of the microphone channel is judged to be in a first standard range and the signal intensity value of the echo cancellation channel is judged to be in a second standard range, determining that the audio data collected by the nth microphone is normal.
In a second aspect, an embodiment of the present application provides a linear microphone array performance test fixture, including: the clamp comprises a clamp shell, a linear microphone array and a linear microphone array, wherein the clamp shell is provided with an audio through hole and used for receiving preset audio played by a loudspeaker outside the clamp shell;
a processor and a speaker disposed within the clamp housing; the processor is configured to control the speaker to play preset audio, and execute the following steps:
audio data acquisition is carried out through a linear microphone array; the linear microphone array comprises a plurality of microphones
Determining a microphone channel signal strength value and an echo cancellation channel signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data;
when the signal intensity value of the microphone channel is judged not to be in a first standard range, determining that the nth microphone is abnormal;
when the echo cancellation channel signal intensity value is judged not to be within a second standard range, judging that a loop electric signal of the linear microphone array is abnormal;
and when the signal intensity value of the microphone channel is judged to be in a first standard range and the signal intensity value of the echo cancellation channel is judged to be in a second standard range, determining that the audio data collected by the nth microphone is normal.
In a third aspect, embodiments of the present application provide a storage medium, in which one or more programs including execution instructions are stored, where the execution instructions can be read and executed by an electronic device (including but not limited to a computer, a server, or a network device, etc.) to perform any one of the above-described linear microphone array performance testing methods of the present application.
In a fourth aspect, an electronic device is provided, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform any of the linear microphone array performance testing methods of the present application.
In a fifth aspect, the present application further provides a computer program product, the computer program product comprising a computer program stored on a storage medium, the computer program comprising program instructions, which when executed by a computer, cause the computer to perform any one of the above-mentioned linear microphone array performance testing methods.
The beneficial effects of the embodiment of the application are that: the performance of the linear microphone array is tested by playing the preset audio, and whether the audio data collected by the current microphone is normal or not is determined by judging whether the signal intensity value of the microphone and the loop signal are abnormal or not, so that the accuracy of the performance test is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a test performed by using a linear microphone array performance test fixture provided in the present application;
FIG. 2 is a flow chart of an embodiment of a linear microphone array performance testing method of the present application;
FIG. 3 is a flow chart of another embodiment of a linear microphone array performance testing method of the present application;
FIG. 4 is a schematic flow chart illustrating an embodiment of a test using the linear microphone array performance testing fixture provided herein;
fig. 5 is a schematic structural diagram of an embodiment of an electronic device of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
In this application, "module," "device," "system," and the like refer to the relevant entity, either hardware, a combination of hardware and software, or software in execution, that applies to a computer. In particular, for example, an element may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. Also, an application or script running on a server, or a server, may be an element. One or more elements may be in a process and/or thread of execution and an element may be localized on one computer and/or distributed between two or more computers and may be operated by various computer-readable media. The elements may also communicate by way of local and/or remote processes based on a signal having one or more data packets, e.g., from a data packet interacting with another element in a local system, distributed system, and/or across a network in the internet with other systems by way of the signal.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The application provides a method and a clamp for testing the performance of a linear microphone array, and as shown in fig. 1, the method and the clamp are a schematic structural diagram of an embodiment in which the linear microphone array performance testing clamp provided by the application is used for testing.
As shown in fig. 1, a core board, an expansion board and a speaker connected with the core board are arranged in the clamp box body; the external device connected with the expansion board is arranged outside the box body, and the clamp ejector pins are arranged between the expansion board and the linear MIC board in a linkage mode. The core board comprises a processor for controlling the loudspeaker to play preset audio, and the extension board controls the linear MIC board which triggers the external linkage driving device to drive the clamp thimble to collect audio. Further, the core board acquires audio data collected by the linear MIC board to perform corresponding analysis processing. The expansion board comprises a plurality of communication interfaces for realizing communication connection with external equipment. The peripheral device may illustratively be a code scanner, and in practice performance testing of a linear MIC board may be initiated by scanning a two-dimensional code or bar code on the linear MIC board with the code scanner.
Illustratively, the workflow between the various parts in FIG. 1 is as follows:
the clamp comprises a clamp body, a core board, an extension board, an apk interface and a power amplifier chip, wherein the clamp body is internally provided with the core board and the extension board, the extension board is externally provided with an operating instruction to directly operate the apk interface so as to reduce the actual difficulty of mass production operation, and the core board is externally connected with a loudspeaker through the power amplifier chip so as to simulate a manual mouth to emit sound. Display screen of the fixture cartridge illustratively, the fixture cartridge is configured with a display screen on which the apk interface is displayed.
And secondly, a groove is formed in the upper part of the box body to serve as a sound receiving hole of the linear MIC board, a silica gel sleeve is attached to the linear MIC board microphone to reduce the influence of the vibration of hardware on the tested audio data, a small hole is formed in the box body to serve as the sound receiving hole, the contact space between the linear microphone and the outside is also reduced, and the noise interference is filtered to a great extent.
Illustratively, the linear MIC plate is fixed in a specific groove and placed downwards, and a sound receiving hole channel is designed for each MIC position on the linear MIC plate, and the MIC is relatively isolated from the outside by a cavity.
And thirdly, the data acquired by the linear MIC board to be tested are mechanically contacted through the ejector pin of the clamp and transmitted to the core board of the box body through the lead, and the core board of the box body can process the acquired data, so that the cost problem of high corollary equipment configuration is avoided.
And fourthly, because the difference that a plurality of linear microphones collect the same loudspeaker sound source is increased, the difference of the internal environment interference of the clamp box body needs to be calibrated in the anechoic chamber through the microphones at different linear positions so as to correct the difference of the collected data between different microphones of the linear collecting plate.
As shown in fig. 2, an embodiment of the present application provides a method for testing performance of a linear microphone array, where the linear microphone array includes a plurality of microphones, and the method includes:
s10, controlling to play preset audio, and acquiring audio data through the linear microphone array; illustratively, the preset audio is single-frequency-point audio.
S20, determining a microphone channel signal strength value and an echo cancellation channel signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data;
s30, when the signal intensity value of the microphone channel is judged not to be in the first standard range, determining that the nth microphone is abnormal;
s40, when the echo cancellation channel signal intensity value is judged not to be in a second standard range, judging that a loop electric signal of the linear microphone array is abnormal;
and S50, when the microphone channel signal intensity value is judged to be in a first standard range and the echo cancellation channel signal intensity value is judged to be in a second standard range, determining that the audio data collected by the nth microphone is normal.
In the embodiment, the performance of the linear microphone array is tested by playing the preset audio, and whether the signal intensity value of the microphone and the loop signal are abnormal is judged to determine whether the audio data collected by the current microphone is normal, so that the accuracy of the performance test is improved.
Fig. 3 is a flowchart of another embodiment of a linear microphone array performance testing method according to the present application, which further includes: when the value of n is greater than 1, the determining a microphone channel signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data comprises:
s21, determining signal strength correction values based on the signal strength values of the n-1 microphone channels corresponding to the first n-1 microphones; illustratively, the signal strength correction value is taken as an arithmetic mean of the n-1 microphone channel signal strength values corresponding to the first n-1 microphones.
S22, determining an initial microphone channel signal strength value corresponding to an nth microphone of the plurality of microphones based on the collected audio data;
and S23, correcting the initial microphone channel signal intensity value according to the correction value to obtain a microphone channel signal intensity value corresponding to the nth microphone.
In the embodiment of the application, the microphone channel signal intensity values of the first n-1 tested microphones are used for determining the correction value to correct the channel signal intensity value of the nth microphone, so that the corrected channel signal intensity value of the nth microphone can accurately determine the actual test difference among the microphones, and therefore whether the linear microphones meet the requirement of consistency or not can be accurately judged.
Fig. 4 is a schematic flowchart of an embodiment of a test performed by using the linear microphone array performance testing fixture provided in the present application.
Step 2, scanning a code by a code scanning gun; illustratively, the test fixture's peripherals are configured as a scanhead gun, and each linear MIC board under test is printed with a two-dimensional code or bar code for in-line and after-market tracking.
Step 3, collecting audio data by the MIC; exemplarily, after a code scanning gun scans codes, a core board of the test fixture automatically triggers a loudspeaker to play preset audio, and simultaneously starts a linear MIC board to be tested to acquire audio data; for example, the linear MIC board to be tested is configured with n microphones, and then audio data collected by the n microphones is transmitted to the memory configured in the core board, so as to be used for the processor configured in the core board to perform analysis processing.
Step 4, FFT algorithm processing; illustratively, the processor processes the audio data collected by the n microphones one by one and extracts the corresponding MIC _ dB values and loop _ dB values.
The MIC _ dB and the loop _ dB refer to signal strength values recorded by an MIC channel and an echo cancellation channel respectively, and the MIC _ dB and the loop _ dB satisfy a certain relationship, and exemplarily, when the loop _ dB reaches a maximum value, the MIC _ dB value cannot exceed a range to generate a clipping phenomenon. For example, a 3w power amplifier has a maximum loop _ db value corresponding to a loop under a product rated power output condition, and under the condition, it is ensured that a sound pressure level at the mic does not exceed 120 dBSPL.
Step 5.1, judging the MIC _ dB value; illustratively, the MIC _ dB value of the obtained signal from the current microphone is compared with a first standard range, if the MIC _ dB value falls within the first standard range, the performance of the current microphone is determined to be normal, otherwise, the performance of the current microphone is determined to be abnormal, and the determination result is displayed on an interface of the test fixture.
Step 5.2, judging a loop _ dB value; illustratively, the loop _ dB value of the obtained signal from the current microphone is compared with the second standard range, and if the loop _ dB value falls within the second standard range, the loop electric signal is determined to be normal, otherwise, the loop electric signal is determined to be abnormal, and the determination result is displayed on the interface of the test fixture.
Illustratively, the loop electrical signal refers to a signal that is played locally by the machine and is retrieved and used to implement an echo cancellation algorithm, with the mic satisfying a certain relationship. Illustratively, the mic signal and the loop electrical signal are in a phase synchronous relationship.
Illustratively, by setting a specific playback volume, a standard range (a first standard range and a second standard range) is set after laboratory calibration, the standard range is filled in a test apk, an actually tested value is compared with the standard range, and if the actually tested value exceeds the standard range, an abnormality is determined.
And 6, if the judgment results in the steps 5.1 and 5.2 are not normal, displaying the judgment results on an interface of the test fixture, and generating a correction value for correcting the MIC _ dB value of the next microphone based on the MIC _ dB values of one or more microphones obtained before.
Illustratively, the generation of the correction value based on the MIC _ dB values of one or more microphones that have been obtained before is specifically: the arithmetic mean of the MIC _ dB values of one or more microphones that have been obtained before is taken as the correction value. n denotes the number of the microphone being calibrated, An denotes the signal amplitude value (i.e., MIC _ dB value) of the microphone numbered n at the time of calibration, Sn denotes the sum of the signal amplitude values of the plurality of microphones: sn ═ An + An-1+. + a 1.
Since MIC collects sound source and is influenced by noise, cavity reflection, position, etc., this also causes audio information received by multiple microphones on linear PCBA to be inconsistent, thus it is difficult to measure consistency among multiple microphones with unified standard. To solve this problem, the microphones should be made to receive audio data with as little difference as possible, and then compared transversely to determine whether the microphones meet the requirement for consistency and whether the resulting audio data difference is within a reasonable interval.
In order to simulate a product test environment as much as possible, the audio acquisition effect of the linear microphones is tested in the fixture box, but in order to control other interference factors, a PCBA with small consistency difference of the linear microphones is selected, the PCBA and the fixture are used for testing several groups of audio data in a anechoic chamber, and the average value is calculated to approximately calculate the actual test difference of each microphone in the fixture box. By adding the set of difference values (correction values) to the MIC _ dB value calculated by the algorithm, the difference result between the microphones displayed on the actual interface can be seen, and whether the linear microphones meet the consistency requirement or not can be judged.
It is noted that while for simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present application is not limited by the order of acts, as some steps may, in accordance with the present application, occur in other orders and concurrently. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application. In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In some embodiments, embodiments of the present application further provide a linear microphone array performance test fixture, including:
the clamp comprises a clamp shell, a linear microphone array and a linear microphone array, wherein the clamp shell is provided with an audio through hole and used for receiving preset audio played by a loudspeaker outside the clamp shell; the preset audio is single-frequency point audio.
A processor and a speaker disposed within the clamp housing; the processor is configured to control the speaker to play preset audio, and execute the following steps:
audio data acquisition is carried out through a linear microphone array; the linear microphone array comprises a plurality of microphones
Determining a microphone channel signal strength value and an echo cancellation channel signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data;
when the signal intensity value of the microphone channel is judged not to be in a first standard range, determining that the nth microphone is abnormal;
when the echo cancellation channel signal intensity value is judged not to be within a second standard range, judging that a loop electric signal of the linear microphone array is abnormal;
and when the signal intensity value of the microphone channel is judged to be in a first standard range and the signal intensity value of the echo cancellation channel is judged to be in a second standard range, determining that the audio data collected by the nth microphone is normal.
In some embodiments, the processor is further configured to:
when the value of n is greater than 1, the determining a microphone channel signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data comprises:
determining a signal strength correction value based on n-1 microphone channel signal strength values corresponding to the first n-1 microphones; illustratively, the signal strength correction value is taken as an arithmetic mean of the n-1 microphone channel signal strength values corresponding to the first n-1 microphones.
Determining an initial microphone channel signal strength value corresponding to an nth microphone of the plurality of microphones based on the collected audio data;
and correcting the initial microphone channel signal intensity value according to the correction value to obtain a microphone channel signal intensity value corresponding to the nth microphone.
The application provides a small and small test fixture to realize the basic function of testing the performance of the linear microphone in mass production, and relieves the problem that the acoustic product can be tested only by the professional equipment
The contradiction between evaluation and the difficulty of providing such acoustic testing devices by general companies. And professional instruments need to be operated by professional personnel, the difficulty is high, the time is long, and batch test is almost impossible, so that the mutual transformation of products from research and development, trial production to mass production and finally to the market is seriously hindered, and the policy idea of integration of production, research and development is difficult to implement. The patent can enable the acoustic mass production test to be possible to a certain extent, simplifies the test process, reduces the cost, and provides a direction for mass production test normalization and batch production.
In some embodiments, the present application provides a non-transitory computer-readable storage medium, in which one or more programs including executable instructions are stored, and the executable instructions can be read and executed by an electronic device (including but not limited to a computer, a server, or a network device, etc.) to perform any one of the above-mentioned linear microphone array performance testing methods of the present application.
In some embodiments, the present embodiments also provide a computer program product comprising a computer program stored on a non-volatile computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform any of the above linear microphone array performance testing methods.
In some embodiments, the present application further provides an electronic device, which includes: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a linear microphone array performance testing method.
In some embodiments, the present application further provides a storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements a linear microphone array performance testing method.
Fig. 5 is a schematic diagram of a hardware structure of an electronic device for performing a method for testing performance of a linear microphone array according to another embodiment of the present application, and as shown in fig. 5, the electronic device includes:
one or more processors 510 and memory 520, with one processor 510 being an example in fig. 5.
The apparatus for performing the linear microphone array performance test method may further include: an input device 530 and an output device 540.
The processor 510, the memory 520, the input device 530, and the output device 540 may be connected by a bus or other means, and the bus connection is exemplified in fig. 5.
The memory 520, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the method for testing the performance of the linear microphone array in the embodiment of the present application. The processor 510 executes various functional applications and data processing of the server by executing nonvolatile software programs, instructions and modules stored in the memory 520, so as to implement the method for testing the performance of the linear microphone array according to the embodiment of the method.
The memory 520 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the stored data area may store data created according to the use of the linear microphone array performance testing apparatus, and the like. Further, the memory 520 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 520 may optionally include memory remotely located from the processor 510, which may be connected to the linear microphone array performance testing device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 530 may receive input numeric or character information and generate signals related to user settings and functional control of the linear microphone array performance testing device. The output device 540 may include a display device such as a display screen.
The one or more modules are stored in the memory 520 and, when executed by the one or more processors 510, perform the linear microphone array performance testing method of any of the method embodiments described above.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the methods provided in the embodiments of the present application.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a general hardware platform, and certainly can also be implemented by hardware. Based on such understanding, the above technical solutions substantially or contributing to the related art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A linear microphone array performance testing method, the linear microphone array comprising a plurality of microphones, the method comprising:
controlling to play preset audio, and acquiring audio data through the linear microphone array;
determining a signal strength value corresponding to an nth microphone of the plurality of microphones and a loop signal strength value for the nth microphone based at least on the collected audio data;
when the signal intensity value of the nth microphone is judged not to be in a first standard range, determining that the nth microphone is abnormal;
when the loop signal intensity value of the nth microphone is judged not to be within a second standard range, judging that the loop electric signal of the linear microphone array is abnormal;
and when the signal intensity value of the nth microphone is judged to be in a first standard range and the loop signal intensity value of the nth microphone is judged to be in a second standard range, determining that the audio data collected by the nth microphone is normal.
2. The method of claim 1, further comprising: when the value of n is greater than 1, the determining a signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data comprises:
determining a signal strength correction value based on n-1 signal strength values corresponding to the first n-1 microphones;
determining an initial signal strength value corresponding to an nth microphone of the plurality of microphones based on the collected audio data;
and correcting the initial signal intensity value according to the correction value to obtain a signal intensity value corresponding to the nth microphone.
3. The method of claim 2, wherein said determining a signal strength correction value based on n-1 signal strength values corresponding to the first n-1 microphones comprises:
the signal strength correction value is taken as the arithmetic mean of the n-1 signal strength values corresponding to the first n-1 microphones.
4. The method of claim 1, wherein the preset audio is single-frequency point audio.
5. A linear microphone array performance test fixture, comprising:
the clamp comprises a clamp shell, a linear microphone array and a linear microphone array, wherein the clamp shell is provided with an audio through hole and used for receiving preset audio played by a loudspeaker in the clamp shell;
a processor and a speaker disposed within the clamp housing; the processor is configured to control the speaker to play preset audio, and execute the following steps:
audio data acquisition is carried out through a linear microphone array; the linear microphone array comprises a plurality of microphones
Determining a signal strength value corresponding to an nth microphone of the plurality of microphones and a loop signal strength value for the nth microphone based at least on the collected audio data;
when the signal intensity value of the nth microphone is judged not to be in a first standard range, determining that the nth microphone is abnormal;
when the loop signal intensity value of the nth microphone is judged not to be within a second standard range, judging that the loop electric signal of the linear microphone array is abnormal;
and when the signal intensity value of the nth microphone is judged to be in a first standard range and the loop signal intensity value of the nth microphone is judged to be in a second standard range, determining that the audio data collected by the nth microphone is normal.
6. The linear microphone array performance testing fixture of claim 5, wherein the processor is further configured to:
when the value of n is greater than 1, the determining a signal strength value corresponding to an nth microphone of the plurality of microphones based at least on the collected audio data comprises:
determining a signal strength correction value based on n-1 signal strength values corresponding to the first n-1 microphones;
determining an initial signal strength value corresponding to an nth microphone of the plurality of microphones based on the collected audio data;
and correcting the initial signal intensity value according to the correction value to obtain a signal intensity value corresponding to the nth microphone.
7. The linear microphone array performance testing fixture of claim 6, wherein the determining signal strength correction values based on n-1 signal strength values corresponding to the first n-1 microphones comprises:
the signal strength correction value is taken as the arithmetic mean of the n-1 signal strength values corresponding to the first n-1 microphones.
8. The linear microphone array performance test fixture of claim 5, wherein the preset audio is a single frequency point audio.
9. An electronic device, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the steps of the method of any one of claims 1-4.
10. A storage medium on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911004757.7A CN110691314B (en) | 2019-10-22 | 2019-10-22 | Linear microphone array performance test method and clamp |
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| CN111586547B (en) * | 2020-04-28 | 2022-05-06 | 北京小米松果电子有限公司 | Detection method and device of audio input module and storage medium |
| CN112289336B (en) * | 2020-10-30 | 2023-10-27 | 维沃移动通信有限公司 | Audio signal processing method and device |
| CN113259830B (en) * | 2021-04-26 | 2023-03-21 | 歌尔股份有限公司 | Multi-microphone consistency test system and method |
| CN113543010B (en) * | 2021-09-15 | 2022-02-22 | 阿里巴巴达摩院(杭州)科技有限公司 | Detection method and device for microphone equipment, storage medium and processor |
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