CN111050268A - Phase testing system, method, device, equipment and medium of microphone array - Google Patents
Phase testing system, method, device, equipment and medium of microphone array Download PDFInfo
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- CN111050268A CN111050268A CN202010047681.2A CN202010047681A CN111050268A CN 111050268 A CN111050268 A CN 111050268A CN 202010047681 A CN202010047681 A CN 202010047681A CN 111050268 A CN111050268 A CN 111050268A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
- H04R29/005—Microphone arrays
Abstract
The embodiment of the invention discloses a phase test system, a phase test method, a phase test device, phase test equipment and phase test media of a microphone array, wherein the system comprises a test sound source, the microphone array to be tested and audio processing equipment, wherein the test sound source comprises: the test sound source is placed on the perpendicular bisector of any two adjacent microphone units in the microphone array to be tested and used for providing test audio for the microphone array to be tested; the audio processing equipment is in communication connection with the microphone array to be tested and is used for recording each microphone unit in the microphone array to be tested and acquiring audio data corresponding to each microphone unit; and testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit. The technical scheme of the embodiment of the invention can reduce the phase testing difficulty of the microphone array and improve the phase testing precision of the microphone array.
Description
Technical Field
The embodiment of the invention relates to the technical field of testing, in particular to a phase testing system, method, device, equipment and medium of a microphone array.
Background
The microphone array is a system composed of a certain number of acoustic sensors (generally microphones) and used for sampling and processing the spatial characteristics of a sound field, and is widely applied to electronic equipment, such as various recording devices or intelligent sound boxes.
In the hardware development of actual products, it is an extremely important test link to confirm the phase test of a microphone array in the early stage. In the prior art, when testing the phase of a microphone array, particularly a ring-shaped microphone array, the distance from a sound source to each microphone in the array needs to be accurately determined, so that a general test needs to place the sound source at the center of the microphone array, and a larger sound box is needed as the sound source.
In the process of implementing the invention, the inventor finds that the prior art has the following defects: the existing phase testing method of the microphone array has strict requirements on the placement accuracy of a sound source and great placement difficulty, so that the testing error is great.
Disclosure of Invention
The embodiment of the invention provides a phase testing system, method, device, equipment and medium of a microphone array, which are used for reducing the phase testing difficulty of the microphone array and improving the phase testing precision of the microphone array.
In a first aspect, an embodiment of the present invention provides a phase test system for a microphone array, including a test sound source, a microphone array to be tested, and an audio processing device, where:
the test sound source is placed on the perpendicular bisector of any two adjacent microphone units in the microphone array to be tested and used for providing test audio for the microphone array to be tested;
the audio processing equipment is in communication connection with the microphone array to be tested and is used for recording each microphone unit in the microphone array to be tested and acquiring audio data corresponding to each microphone unit; and testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit.
In a second aspect, an embodiment of the present invention further provides a method for testing a phase of a microphone array, including:
recording each microphone unit in a microphone array to be tested, and acquiring audio data corresponding to each microphone unit;
testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit;
a test sound source is placed on the midperpendicular of two adjacent microphone units of the microphone array to be tested; the test sound source is used for providing test audio for the microphone array to be tested.
In a third aspect, an embodiment of the present invention further provides a phase testing apparatus for a microphone array, including:
the first audio data acquisition module is used for recording each microphone unit in the microphone array to be tested and acquiring audio data corresponding to each microphone unit;
the first phase testing module is used for testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit;
a test sound source is placed on the midperpendicular of two adjacent microphone units of the microphone array to be tested; the test sound source is used for providing test audio for the microphone array to be tested.
In a fourth aspect, an embodiment of the present invention further provides a computer device, where the computer device includes:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a method for phase testing of a microphone array as provided by any of the embodiments of the invention.
In a fifth aspect, an embodiment of the present invention further provides a computer storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for testing the phase of the microphone array according to any embodiment of the present invention is implemented.
According to the embodiment of the invention, the test sound source is placed on the perpendicular bisector of any two adjacent microphone units in the microphone array to be tested to provide the test audio for the microphone array to be tested, the audio processing equipment is used for recording each microphone unit in the microphone array to be tested to obtain the audio data corresponding to each microphone unit, and the phase of the microphone array to be tested is tested according to the audio data corresponding to each microphone unit, so that the problems of high test difficulty and large test error of the existing phase test method of the microphone array are solved, the phase test difficulty of the microphone array is reduced, and the phase test precision of the microphone array is improved.
Drawings
Fig. 1a is a schematic diagram of a phase testing system of a microphone array according to an embodiment of the present invention;
fig. 1b is a top view of a partial structure of a phase testing system of a microphone array according to an embodiment of the present invention;
fig. 1c is a left side view of a partial structure of a phase testing system of a microphone array according to an embodiment of the present invention;
fig. 1d is a front view of a partial structure of a phase testing system of a microphone array according to an embodiment of the present invention;
fig. 2 is a flowchart of a phase testing method for a microphone array according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of a phase testing apparatus of a microphone array according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a computer device according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
The terms "first" and "second," and the like in the description and claims of embodiments of the invention and in the drawings, are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
Example one
Fig. 1a is a schematic diagram of a phase testing system of a microphone array according to an embodiment of the present invention, and as shown in fig. 1a, the phase testing system of the microphone array has a structure including: a test audio source 10, an array of microphones 20 to be tested, and an audio processing device 30, wherein:
the test sound source 10 is placed on the perpendicular bisector of any two adjacent microphone units 210 in the microphone array 20 to be tested and used for providing test audio for the microphone array 20 to be tested; the audio processing device 30 is in communication connection with the microphone array 20 to be tested, and is configured to record each microphone unit 210 in the microphone array 20 to be tested, and acquire audio data corresponding to each microphone unit 210; and testing the phase of the microphone array 20 to be tested according to the audio data corresponding to each microphone unit 210.
The test sound source 10 may be configured to provide a sound source for the microphone array 20 to be tested, and optionally, the test sound source 10 may adopt an artificial sound source (also referred to as an artificial mouth), and the embodiment of the present invention does not limit the specific type of the test sound source 10. The microphone array 20 to be tested may be any type of microphone array, such as a dual-microphone linear microphone array, a multi-microphone annular microphone array, or an offline microphone array, and the embodiment of the present invention does not limit the specific type of the microphone array 20 to be tested. Preferably, as shown in fig. 1a, the microphone array 20 to be tested may be a ring-shaped microphone array. The audio processing device 30 may record each microphone unit 210 in the microphone array 20 to be tested, and test the phase of the microphone array 20 to be tested according to the audio data obtained by recording.
It should be noted that, in the embodiment of the present invention, the audio processing device 30 may integrate the recording function and the audio data testing function. The first audio processing equipment can be used for specially recording, and the second audio processing equipment can be used for specially testing the audio data.
It should be noted that the test audio source 10, the array of microphones 20 to be tested, and the audio processing device 30 in the embodiment of the present invention may be integrated into one device, that is, the phase testing system of the microphone array may be integrated into one device.
In the embodiment of the present invention, the test sound source 10 does not need to be placed at the center of the microphone array 20 to be tested, but only the test sound source 10 needs to be placed on the perpendicular bisector of any two adjacent microphone units 210 in the microphone array 20 to be tested, so as to ensure that the linear distances between each opposite microphone unit 210 on the perpendicular bisector and the test sound source 10 are equal. The audio processing device 30 may record each microphone unit 210 in the microphone array 20 to be tested, acquire audio data corresponding to each microphone unit 210, and test the phase of the microphone array 20 to be tested according to the audio data corresponding to each microphone unit 210. It should be noted that, a certain distance needs to be kept between the test sound source 10 and each microphone unit 210 in the microphone array 20 to be tested, and the distance can be adjusted according to the test frequency, and generally, the distance needs to be kept above 20cm to prevent the interference phenomenon from occurring too close to each other. Illustratively, assuming that the test frequency is 8kHz, the distance between the test sound source 10 and each microphone unit 210 in the microphone array 20 to be tested is at least 25 cm.
Therefore, when the phase testing system of the microphone array in the embodiment of the invention is used for testing, the requirement on the placement position of the testing sound source 10 is relatively loose, the point-to-point position does not need to be accurately confirmed, and the phase testing difficulty of the microphone array is effectively reduced. In addition, since the straight-line distances between the test sound source 10 and the opposite microphone units 210 on the midperpendicular of the test sound source 10 are equal, the test audio provided by the test sound source 10 received by the opposite microphone units 210 on the midperpendicular is also the same. Therefore, the audio processing device 30 can test the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit with high precision.
In an alternative embodiment of the present invention, the audio processing device 30 is further configured to: after confirming that the microphone array 20 to be tested rotates by the preset angle in the preset direction, recording each microphone unit in the microphone array 20 to be tested again, acquiring the audio data corresponding to each microphone unit, and testing the phase of the microphone array 20 to be tested according to the audio data corresponding to each microphone unit acquired again.
The preset direction may be a clockwise direction or a counterclockwise direction, the preset angle may be determined according to the number of the microphone units 210 included in the microphone array 20 to be tested, and may be 30 °, 60 °, 120 °, or 180 °, and the like, as long as after the microphone array 20 to be tested rotates by the preset angle according to the preset direction, the horizontal line where the test sound source 10 is located may still be used as the perpendicular bisector of the two microphone units 210, and therefore, the specific content of the preset direction and the preset angle is not limited in the embodiment of the present invention.
After the audio device completes the phase test of the microphone array 20 to be tested once, in order to further ensure the test accuracy, the microphone array 20 to be tested may be rotated by a preset angle in a preset direction, each microphone unit 210 in the microphone array 20 to be tested is recorded again, audio data corresponding to each microphone unit 210 is obtained, and the phase of the microphone array 20 to be tested is tested according to the audio data corresponding to each microphone unit 210 obtained again. The number of times of rotating the microphone array 20 to be tested by the preset angle in the preset direction may be multiple times, and the rotation modes may be the same or different each time.
It should be noted that, if the microphone array 20 to be tested is not rotated in the preset direction and the preset angle, the testing accuracy can also be improved according to the primary testing result and the later compensation processing.
In an alternative embodiment of the present invention, the audio processing device 30 is specifically configured to: calculating the phase difference between any two opposite microphone units 210 on the middle vertical line according to the acquired audio data through audio test software; and if the phase difference between any two opposite microphone units 210 on the middle vertical line is determined to meet the phase consistency requirement, determining that the phases of the microphone array 20 to be tested are consistent.
The audio test software may be soundcheck type audio test software, and the specific type of the audio test software is not limited in the embodiment of the present invention. The phase consistency requirement is that the phase difference between any two opposite microphone units 210 on the midperpendicular is consistent.
Specifically, when the audio processing device 30 tests the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit, the audio testing software may calculate the phase difference between any two opposite microphone units 210 on the central vertical line according to the obtained audio data, and when it is determined that the phase difference between any two opposite microphone units 210 on the central vertical line meets the phase consistency requirement, that is, when the phase difference between any two opposite microphone units 210 on the central vertical line is consistent, it is determined that the phases of the microphone array to be tested 20 are consistent. Wherein, the meaning that the phase difference is kept consistent can be: the phase difference values are the same, or the difference value between the phase difference values is within a preset error range. For example, the preset error range may be ± 3 ° or the like, which is not limited by the embodiment of the present invention.
Fig. 1b is a top view of a partial structure of a phase testing system of a microphone array according to an embodiment of the present invention, fig. 1c is a left side view of the partial structure of the phase testing system of the microphone array according to the embodiment of the present invention, and fig. 1d is a front view of the partial structure of the phase testing system of the microphone array according to the embodiment of the present invention. In a specific example, as shown in fig. 1b, 1c and 1d, the microphone array to be tested may include 6 microphone units such as mic1, mic2, mic3, mic4, mic5 and mic6, and the 6 microphone units are uniformly distributed on a mic PCB (printed circuit Board). The microphone array to be tested may be placed horizontally on a test bed. The sound source artificial mouth is used as a test sound source 10 and is positioned on the midperpendicular of two adjacent microphone units of mic1 and mic2, the artificial mouth can be controlled to play frequency sweep through sound test software such as soundcheck, recording is carried out on each microphone unit in the microphone array to be tested through audio processing equipment, and phase differences between each two of mic1 and mic2, between mic3 and mic6 and between each two of mic4 and mic5 are calculated according to obtained audio data through the audio test software. Then, the microphone array to be tested can be rotated by 60 degrees clockwise, each microphone unit in the microphone array to be tested is recorded again through the audio processing equipment, and phase differences between mic2 and mic3, mic1 and mic4, and mic5 and mic6 are calculated through audio test software according to the audio data obtained again. And if the obtained phase difference between every two mics meets the phase consistency requirement, determining that the phases of the microphone array to be tested are consistent.
According to the technical scheme of the embodiment, the test sound source is placed on the perpendicular bisector of any two adjacent microphone units in the microphone array to be tested to provide test audio for the microphone array to be tested, the audio processing equipment is used for recording each microphone unit in the microphone array to be tested to obtain audio data corresponding to each microphone unit, the phase of the microphone array is tested according to the audio data corresponding to each microphone unit, the problems of high test difficulty and high test error of the existing phase test method of the microphone array are solved, the phase test difficulty of the microphone array is reduced, and the phase test precision of the microphone array is improved.
Example two
Fig. 2 is a flowchart of a phase testing method for a microphone array according to a second embodiment of the present invention, which is applicable to a situation where the phase of the microphone array is accurately tested, and the method can be performed by a phase testing apparatus for a microphone array, which can be implemented by software and/or hardware, and can be generally integrated into a computer device, which is typically a device with an audio processing function, and is used in cooperation with the microphone array to be tested and a testing sound source. Accordingly, as shown in fig. 2, the method includes the following operations:
s110, recording each microphone unit in the microphone array to be tested, and acquiring audio data corresponding to each microphone unit.
A test sound source is placed on the midperpendicular of two adjacent microphone units of the microphone array to be tested; the test sound source is used for providing test audio for the microphone array to be tested.
And S120, testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit.
In an optional embodiment of the present invention, the microphone array to be tested is a ring-shaped microphone array; the test sound source is an artificial sound source.
In the embodiment of the invention, the test sound source can be placed on the perpendicular bisector of any two adjacent microphone units in the microphone array to be tested, and the test sound source provides the test audio for the microphone array to be tested. And then, recording each microphone unit in the microphone array to be tested through the audio processing equipment so as to obtain audio data corresponding to each microphone unit, and testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit.
In an optional embodiment of the present invention, after the testing the phase of the microphone array under test according to the audio data corresponding to each of the microphone units, the method may further include: after confirming that the microphone array to be tested rotates for a preset angle in a preset direction, recording each microphone unit in the microphone array to be tested again, and acquiring audio data corresponding to each microphone unit; and testing the phase of the microphone array to be tested according to the obtained audio data corresponding to each microphone unit.
The preset direction may be a clockwise direction or an anticlockwise direction, the preset angle may be determined according to the number of the microphone units 210 included in the microphone array 20 to be tested, and may be 30 °, 60 °, 120 °, or 180 °, and the like, and as long as the microphone array to be tested rotates by the preset angle according to the preset direction, the horizontal line where the test sound source is located may still be used as the perpendicular bisector of the two microphone units, and therefore, the specific content of the preset direction and the preset angle is not limited in the embodiment of the present invention.
After the audio device completes the phase test of the microphone array to be tested once, in order to further ensure the test precision, the microphone array to be tested can be rotated by a preset angle according to a preset direction, each microphone unit in the microphone array to be tested is recorded again, audio data corresponding to each microphone unit is obtained, and the phase of the microphone array to be tested is tested according to the audio data corresponding to each microphone unit obtained again. The number of times of rotating the microphone array to be tested by the preset angle according to the preset direction can be multiple times, and the rotating modes of the microphone array to be tested can be the same or different.
It should be noted that, if the microphone array to be tested is not rotated in the preset direction and the preset angle, the testing accuracy can also be improved according to the primary testing result and the later compensation processing.
In an optional embodiment of the present invention, the testing the phase of the microphone array under test may include: calculating the phase difference between any two opposite microphone units on the middle vertical line according to the acquired audio data through audio test software; and if the phase difference between any two opposite microphone units on the perpendicular bisector is determined to meet the phase consistency requirement, determining that the phases of the microphone array to be tested are consistent.
The audio test software may be soundcheck type audio test software, and the specific type of the audio test software is not limited in the embodiment of the present invention. The phase consistency requirement is that the phase difference between any two opposite microphone units on the midperpendicular keeps consistent.
Specifically, when the audio processing device tests the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit, the audio processing device may calculate the phase difference between any two opposite microphone units on the central vertical line according to the obtained audio data through the audio test software, and when it is determined that the phase difference between any two opposite microphone units on the central vertical line meets the phase consistency requirement, that is, when the phase difference between any two opposite microphone units on the central vertical line is kept consistent, it is determined that the phases of the microphone array to be tested are consistent. Wherein, the meaning that the phase difference is kept consistent can be: the phase difference values are the same, or the difference value between the phase difference values is within a preset error range. For example, the preset error range may be ± 3 ° or the like, which is not limited by the embodiment of the present invention.
According to the embodiment of the invention, the test sound source is placed on the perpendicular bisector of any two adjacent microphone units in the microphone array to be tested to provide the test audio for the microphone array to be tested, the audio processing equipment is used for recording each microphone unit in the microphone array to be tested to obtain the audio data corresponding to each microphone unit, and the phase of the microphone array to be tested is tested according to the audio data corresponding to each microphone unit, so that the problems of high test difficulty and large test error of the existing phase test method of the microphone array are solved, the phase test difficulty of the microphone array is reduced, and the phase test precision of the microphone array is improved.
EXAMPLE III
Fig. 3 is a schematic diagram of a phase testing apparatus of a microphone array according to a third embodiment of the present invention, as shown in fig. 3, the apparatus includes: a first audio data acquisition module 310 and a first phase test module 320, wherein:
the first audio data acquisition module 310 is configured to record each microphone unit in a microphone array to be tested, and acquire audio data corresponding to each microphone unit;
a first phase testing module 320, configured to test a phase of the microphone array to be tested according to the audio data corresponding to each microphone unit;
a test sound source is placed on the midperpendicular of two adjacent microphone units of the microphone array to be tested; the test sound source is used for providing test audio for the microphone array to be tested.
According to the embodiment of the invention, the test sound source is placed on the perpendicular bisector of any two adjacent microphone units in the microphone array to be tested to provide the test audio for the microphone array to be tested, the audio processing equipment is used for recording each microphone unit in the microphone array to be tested to obtain the audio data corresponding to each microphone unit, and the phase of the microphone array to be tested is tested according to the audio data corresponding to each microphone unit, so that the problems of high test difficulty and large test error of the existing phase test method of the microphone array are solved, the phase test difficulty of the microphone array is reduced, and the phase test precision of the microphone array is improved.
Optionally, the apparatus further comprises: the second audio data acquisition module is used for recording each microphone unit in the microphone array to be tested again after confirming that the microphone array to be tested rotates for a preset angle according to a preset direction, and acquiring audio data corresponding to each microphone unit; and the second phase testing module is used for testing the phase of the microphone array to be tested according to the obtained audio data corresponding to each microphone unit.
Optionally, the first phase testing module or the second phase testing module is specifically configured to: calculating the phase difference between any two opposite microphone units on the middle vertical line according to the acquired audio data through audio test software; and if the phase difference between any two opposite microphone units on the perpendicular bisector is determined to meet the phase consistency requirement, determining that the phases of the microphone array to be tested are consistent.
Optionally, the microphone array to be tested is an annular microphone array; the test sound source is an artificial sound source.
The phase testing device of the microphone array can execute the phase testing method of the microphone array provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For details of the technique not described in detail in this embodiment, reference may be made to a phase testing method of a microphone array provided in any embodiment of the present invention.
Since the phase testing apparatus for a microphone array described above is an apparatus that can perform the phase testing method for a microphone array in the embodiment of the present invention, based on the phase testing method for a microphone array described in the embodiment of the present invention, a person skilled in the art can understand a specific implementation manner of the phase testing apparatus for a microphone array of the present embodiment and various variations thereof, so that a detailed description of how the phase testing apparatus for a microphone array implements the phase testing method for a microphone array in the embodiment of the present invention is not provided here. The skilled person in the art should also be able to implement the apparatus for performing the phase testing method of the microphone array in the embodiment of the present invention.
Example four
Fig. 4 is a schematic structural diagram of a computer device according to a fourth embodiment of the present invention. FIG. 4 illustrates a block diagram of a computer device 412 suitable for use in implementing embodiments of the present invention. The computer device 412 shown in FIG. 4 is only one example and should not impose any limitations on the functionality or scope of use of embodiments of the present invention. The computer device 412 is typically a computing device that performs audio processing functions (e.g., recording, analyzing audio data, etc.).
As shown in FIG. 4, computer device 412 is in the form of a general purpose computing device. Components of computer device 412 may include, but are not limited to: one or more processors 416, a storage device 428, and a bus 418 that couples the various system components including the storage device 428 and the processors 416.
The computer device 412 may also communicate with one or more external devices 414 (e.g., keyboard, pointing device, camera, display 424, etc.), with one or more devices that enable a user to interact with the computer device 412, and/or with any devices (e.g., network card, modem, etc.) that enable the computer device 412 to communicate with one or more other computing devices. Such communication may be through an Input/Output (I/O) interface 422. Also, computer device 412 may communicate with one or more networks (e.g., a Local Area Network (LAN), Wide Area Network (WAN), and/or a public Network, such as the internet) through Network adapter 420. As shown, network adapter 420 communicates with the other modules of computer device 412 over bus 418. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the computer device 412, including but not limited to: microcode, device drivers, Redundant processing units, external disk drive arrays, disk array (RAID) systems, tape drives, and data backup storage systems, to name a few.
The processor 416 executes programs stored in the storage 428 to perform various functional applications and data processing, such as implementing the phase testing method of the microphone array provided by the above-described embodiments of the present invention.
That is, the processing unit implements, when executing the program: recording each microphone unit in a microphone array to be tested, and acquiring audio data corresponding to each microphone unit; testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit; a test sound source is placed on the midperpendicular of two adjacent microphone units of the microphone array to be tested; the test sound source is used for providing test audio for the microphone array to be tested.
EXAMPLE five
An embodiment five of the present invention further provides a computer storage medium storing a computer program, which when executed by a computer processor is configured to perform the phase testing method for a microphone array according to any one of the above embodiments of the present invention: recording each microphone unit in a microphone array to be tested, and acquiring audio data corresponding to each microphone unit; testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit; a test sound source is placed on the midperpendicular of two adjacent microphone units of the microphone array to be tested; the test sound source is used for providing test audio for the microphone array to be tested.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-only memory (ROM), an Erasable Programmable Read-only memory (EPROM) or flash memory), an optical fiber, a portable compact disc Read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. The utility model provides a phase place test system of microphone array which characterized in that, includes test sound source, the microphone array and the audio processing equipment of awaiting measuring, wherein:
the test sound source is placed on the perpendicular bisector of any two adjacent microphone units in the microphone array to be tested and used for providing test audio for the microphone array to be tested;
the audio processing equipment is in communication connection with the microphone array to be tested and is used for recording each microphone unit in the microphone array to be tested and acquiring audio data corresponding to each microphone unit; and testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit.
2. The system of claim 1, wherein the audio processing device is further configured to:
after confirming that the microphone array to be tested rotates for a preset angle according to a preset direction, recording each microphone unit in the microphone array to be tested again, acquiring audio data corresponding to each microphone unit, and testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit acquired again.
3. The system of claim 2, wherein the audio processing device is specifically configured to:
calculating the phase difference between any two opposite microphone units on the middle vertical line according to the acquired audio data through audio test software;
and if the phase difference between any two opposite microphone units on the perpendicular bisector is determined to meet the phase consistency requirement, determining that the phases of the microphone array to be tested are consistent.
4. A system according to any of claims 1-3, wherein the array of microphones under test is an annular array of microphones; the test sound source is an artificial sound source.
5. A method for phase testing of a microphone array, comprising:
recording each microphone unit in a microphone array to be tested, and acquiring audio data corresponding to each microphone unit;
testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit;
a test sound source is placed on the midperpendicular of two adjacent microphone units of the microphone array to be tested; the test sound source is used for providing test audio for the microphone array to be tested.
6. The method of claim 5, wherein after the testing the phase of the microphone array under test according to the audio data corresponding to each of the microphone units, further comprising:
after confirming that the microphone array to be tested rotates for a preset angle in a preset direction, recording each microphone unit in the microphone array to be tested again, and acquiring audio data corresponding to each microphone unit;
and testing the phase of the microphone array to be tested according to the obtained audio data corresponding to each microphone unit.
7. The method of claim 6, wherein the testing the phase of the microphone array under test comprises:
calculating the phase difference between any two opposite microphone units on the middle vertical line according to the acquired audio data through audio test software;
and if the phase difference between any two opposite microphone units on the perpendicular bisector is determined to meet the phase consistency requirement, determining that the phases of the microphone array to be tested are consistent.
8. The method of any of claims 5-7, wherein the array of microphones under test is a circular array of microphones; the test sound source is an artificial sound source.
9. A phase testing apparatus of a microphone array, comprising:
the first audio data acquisition module is used for recording each microphone unit in the microphone array to be tested and acquiring audio data corresponding to each microphone unit;
the first phase testing module is used for testing the phase of the microphone array to be tested according to the audio data corresponding to each microphone unit;
a test sound source is placed on the midperpendicular of two adjacent microphone units of the microphone array to be tested; the test sound source is used for providing test audio for the microphone array to be tested.
10. A computer device, characterized in that the computer device comprises:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a method for phase testing of a microphone array as recited in any of claims 5-8.
11. A computer storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out a method for phase testing of a microphone array as claimed in any one of the claims 5 to 8.
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