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Microphone array optimization method for sound source localization

A technology of microphone array and optimization method, applied in microphone array optimization, aviation, automobile, ship field, can solve the problems of high side lobe and low resolution, and achieve the effect of improving resolution, optimizing array and reducing quantity

Active Publication Date: 2022-07-29
上海索辰信息科技股份有限公司
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Problems solved by technology

[0003] The traditional beamforming sound source localization method has the disadvantages of high side lobes and low resolution

Method used

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  • Microphone array optimization method for sound source localization

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Embodiment Construction

[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0030] like figure 1 As shown, this embodiment provides a microphone array optimization method for sound source localization, which includes the following steps:

[0031] Step 101: Determine the highest frequency and the lowest frequency of the acoustic frequency analysis, the sound speed of the propagation medium, and the number of microph...

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Abstract

A microphone array optimization method for sound source localization of the present invention: S1. Determine the highest and lowest frequencies of acoustic frequency analysis, the speed of sound of the propagation medium, and the number of microphones; S2. Select the microphone distribution mode, determine the number of arms and the number of arms S3. Calculate the minimum spacing of the microphones in the microphone array according to the highest frequency and the speed of sound of the propagation medium, determine the starting point of the spiral arm according to the minimum spacing, calculate the maximum spacing of the microphones in the microphone array according to the lowest frequency and the sound speed of the propagation medium, and determine the rotation according to the maximum spacing. Arm end point; S4. Arrange the microphone positions on each arm according to the number of microphones, the number of arms and the distribution of microphones, and obtain the coordinates of each microphone on each arm; S5. Given a point sound source, calculate the point expansion of the microphone array function; S6, determine whether the side lobe value is less than the first set threshold or whether the resolution value is less than the second set threshold, if so, output the coordinates of the microphone array, otherwise, execute S2.

Description

technical field [0001] The invention relates to the technical field of microphone array optimization, in particular to a microphone array optimization method for sound source localization, which is suitable for noise source localization in various occasions and can be widely used in aviation, automobile, ship and other fields. Background technique [0002] Array signal processing has a wide range of applications in sonar, radar, wireless communication, geological exploration, radio astronomy, medical imaging and other fields. Modern microphone arrays are evolved from radar antenna arrays and hydrophone arrays. Soderman and Noble at NASA's Ames Research Center first used a one-dimensional array of microphones to measure jet noise. Subsequent studies on sound source localization using two-dimensional arrays were mainly carried out by Brooks, Unerbrink and Dougherty et al. Since the 1990s, microphone array technology has been widely used in aeroacoustic experiments and has bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 刘引陈灏李吴汇
Owner 上海索辰信息科技股份有限公司
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