Three-dimensional sound source localization method based on compressed sensing

A technology of sound source localization and compressed sensing, which is applied in the direction of localization, measurement devices, instruments, etc., can solve the problem of poor anti-noise performance, etc., and achieve the effect of improving anti-noise performance.

Active Publication Date: 2017-10-13
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0005] In order to overcome the shortcomings of poor anti-noise performance of existing 3D sound source loca...

Method used

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  • Three-dimensional sound source localization method based on compressed sensing
  • Three-dimensional sound source localization method based on compressed sensing
  • Three-dimensional sound source localization method based on compressed sensing

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Embodiment Construction

[0047] refer to Figure 1-5 . This embodiment adopts four monopole sub-acoustics located at S1 (-0.2,0,0.43), S2 (0.2,0,0.43), S3 (-0.2,0,0.74) and S4 (-0.2,0,0.74) source as the sound source signal in the simulation. The specific steps of the 3D sound source localization method based on compressed sensing are as follows:

[0048]Step 1. First, an array with an array diameter of 1 m and 60 microphone sensors is used to collect the simulation signal, and obtain time-domain measurement data of each microphone.

[0049] Step 2: Blocking, windowing, and fast Fourier transform are performed on the obtained measurement data of the microphone array to obtain frequency-domain measurement data of the microphone array.

[0050] In this process, the length of the divided data blocks is 1024, each data block is processed with a Hanning window, and the frequency domain measurement data of the microphone array is obtained by fast Fourier transform. In order to explore the anti-noise per...

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Abstract

The invention discloses a three-dimensional sound source localization method based on compressed sensing, so as to solve the technical problem of poor anti-noise performance of the existing three-dimensional sound source localization method. In the technical scheme, the measurement value of sound source signals is acquired through a microphone array, a selected three-dimensional sound source area is subjected to uniform mesh generation, and each mesh node is used as a hidden sound source position; according to a Helmholtz equation of a free field Green's function, a measurement matrix between the mesh node and the microphone array is built, and a three-dimensional narrowband sound source localization sparse representation model between the measurement value of the microphone array and unknown sound source signals is acquired; through carrying out singular value decomposition on the measurement value of the microphone array in the sparse representation model, a sound source localization sparse representation model after deformation is acquired; and finally, a compressed sensing OMP (orthogonal matching pursuit) algorithm is adopted to carry out iterative solution on the representation model after deformation, the sound source strength of each mesh node in the sound source area is acquired, and the sound source is localized. The anti-noise performance of sound source localization is improved.

Description

technical field [0001] The invention relates to a three-dimensional sound source localization method, in particular to a three-dimensional sound source localization method based on compressed sensing. Background technique [0002] The sound source localization method based on compressed sensing can localize the sound source without satisfying the Nyquist sampling theorem, and can obtain super-resolution localization results. [0003] The document "Ning F, Wei J, Qiu L, et al.Three-dimensional acoustic imaging with planar microphone arrays and compressive sensing [J]. Journal of Sound and Vibration, 2016, 380:112-128." discloses a method based on compressed sensing Orthogonal matching pursuit (OMP) algorithm for 3D sound source localization. The method can locate the sound source in the three-dimensional area based on the microphone array measurement technology and the compressed sensing OMP algorithm. First, the selected three-dimensional sound source area is meshed, and t...

Claims

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Application Information

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IPC IPC(8): G01S5/20
CPCG01S5/20
Inventor 宁方立刘勇韦娟张超
Owner NORTHWESTERN POLYTECHNICAL UNIV
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