32-Channel Omni-Directional Microphone Array Design and Implementation | Zendy

Yoko Sasaki | Zendy; Tomoaki Fujihara | Zendy; Satoshi Kagami | Zendy; Hiroshi Mizoguchi | Zendy; Kyoichi Oro | Zendy

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32-Channel Omni-Directional Microphone Array Design and Implementation

Author(s) -

Yoko Sasaki,

Tomoaki Fujihara,

Satoshi Kagami,

Hiroshi Mizoguchi,

Kyoichi Oro

Publication year - 2011

Publication title -

journal of robotics and mechatronics

Language(s) - English

Resource type - Journals

eISSN - 1883-8049

pISSN - 0915-3942

DOI - 10.20965/jrm.2011.p0378

Subject(s) - beamforming , noise canceling microphone , microphone array , microphone , directivity , robustness (evolution) , computer science , acoustics , sound pressure , telecommunications , antenna (radio) , physics , biochemistry , chemistry , gene

This paper presents the design and evaluation of a microphone array. The proposed evaluation index is the directional characteristic of delay and sum beamforming, which is used to optimize the microphone array design. Using beamforming simulation, a microphone arrangement that minimizes sidelobes and improves the basic performance of beamforming is selected. The new hardware has omni-directional directivity and high tolerance for exogenous noise. It has 32 microphones on a 335-mm diameter disk designed to be mounted on a mobile robot. The microphone array performance is verified in different real environments. Experimental results in indoor/outdoor sound localization show the effectiveness of the array in reverberant environments and its robustness against different pressure sound sources for covering larger areas.

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