On the design of differential beamformers with arbitrary planar microphone array geometry | Zendy

Gongping Huang | Zendy; Jingdong Chen | Zendy; Jacob Benesty | Zendy

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On the design of differential beamformers with arbitrary planar microphone array geometry

Author(s) -

Gongping Huang,

Jingdong Chen,

Jacob Benesty

Publication year - 2018

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.5048044

Subject(s) - planar , microphone , beamforming , differential (mechanical device) , acoustics , microphone array , concentric , planar array , invariant (physics) , geometry , mathematics , mathematical analysis , physics , computer science , optics , loudspeaker , statistics , computer graphics (images) , mathematical physics , thermodynamics

This letter deals with the problem of differential beamforming with microphone arrays of arbitrary planar geometry. By approximating the beampattern with the Jacobi-Anger expansion, it develops an algorithm that can form any specified frequency-invariant beampattern with a microphone array of any planar geometry as long as the sensors' coordinates are given and the spacing between neighboring sensors is smaller than the smallest wavelength. This method is rather general and it can be used to design differential beamformers with linear, circular, and concentric circular differential microphone arrays as well as differential arrays of arbitrary planar geometry where sensors are placed in any specified positions.

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