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Method for identifying planar array deconvolution sound source

A sound source identification and planar array technology, applied in the field of sound field identification, can solve problems such as difficult determination, deterioration of recognition accuracy, positioning deviation, etc., and achieve high spatial resolution and excellent overall performance

Inactive Publication Date: 2019-08-09
AECC HUNAN AVIATION POWERPLANT RES INST +1
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Problems solved by technology

However, the existing OMP-DAMAS method requires prior knowledge of sound source sparsity (prior knowledge refers to the number of noise sources that need to be determined in advance, and the number of iterations is determined based on this number, but this number is not easy to determine in practical applications. ), and when identifying multiple sound sources, the target column is likely to be mistakenly selected as the adjacent column, resulting in deterioration of recognition accuracy and deviation in positioning

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  • Method for identifying planar array deconvolution sound source
  • Method for identifying planar array deconvolution sound source
  • Method for identifying planar array deconvolution sound source

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0035] The present invention comprises the following steps:

[0036] Step 1. Compute traditional beamforming output

[0037] Microphone planar array sampling model such as figure 1 As shown in Fig. 1, it is assumed that the sound sources to be measured fall on the known sound source plane, the microphone plane array is located directly in front of the sound source plane, and the sound pressure signal received by the microphone is transformed into a full frequency domain The cross-spectrum matrix C is expressed by the following formula:

[0038] C=∑ r′ C(r')=∑ r′ q(r')v * (r')v T (r') (1)

[0039] In formula (1), r' is the sound source position vector, q(r') is the source intensity at r', superscript T and * denote transpose and conjugate respectively; v=[v m (r)] represents the steering column vector with the focal point r, v m (r) represents the ste...

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Abstract

The invention discloses a method for identifying a planar array deconvolution sound source. The method comprises the following steps of step 1, calculating a traditional beam forming output result; step 2, establishing an equation set between the beam forming output result and the sound source distribution; and step 3, iteratively solving the sound source distribution, in the step, on the basis ofthe generalized sparsity adaptive matching pursuit gSAMP, a source intensity distribution solving method suitable for a planar array is constructed combined with a sound source identification problem. The method for identifying the planar array deconvolution sound source provided by the invention has the following technical effects of being high in spatial resolution, capable of effectively removing sidelobes and accurately locating each sound source, the positioning precision is superior to that of an existing method OMP-DAMAS, and the priori knowledge of the sparseness of a sound source signal is not needed.

Description

technical field [0001] The invention belongs to the technical field of sound field identification, and in particular relates to a sound source identification method of a plane array. Background technique [0002] The sound source identification method based on microphone array beamforming can reliably identify the sound source and has been widely used, among which the deconvolution approach for the mapping of acoustic sources (DAMAS) is the most classic. Literature "Orthogonal matching pursuit applied to the deconvolution approach for the mapping of acoustic sources inverse problem [J]", Padois T, Berry A, Journal of the Acoustical Society of America, 2015, 138(6): 3678. ("Orthogonal matching pursuit Applied to the inverse problem of deconvolution sound source imaging [J]", Padois T, BerryA, Acoustics of America, 2015, 138(6):3678.) proposed the OMP-DAMAS method, which combines the Orthogonal matching pursuit, OMP) is applied to the solution of the DAMAS inverse problem, wh...

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Application Information

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IPC IPC(8): G01S5/20
CPCG01S5/20
Inventor 吴桂娇李智余立超徐福健王平褚志刚
Owner AECC HUNAN AVIATION POWERPLANT RES INST
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