Small array microphone apparatus and beam forming method...

Details Small array microphone apparatus and beam forming method... Small array microphone apparatus and beam forming method...

2011-07-26

2011-07-26

Goins, Davetta (Department: 2614)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S094100, C381S071700

Reexamination Certificate

active

07986794

ABSTRACT:
The invention provides a beam forming method for a small array microphone apparatus to generate cone beam pattern by processing a combined bi-directional beam pattern of two virtual bi-directional microphones formed through at least three omni-directional microphones arranged in an L-shape. The invention also provides a small array microphone apparatus using the beam forming method according to the invention to suppress noise by processing a combined bi-directional beam pattern of two virtual bi-directional microphones formed through at least three omni-directional microphones arranged in an L-shape, thereby outputting a clear audio signal with cone beam pattern.

REFERENCES:
patent: 4559642 (1985-12-01), Miyaji et al.
patent: 5226087 (1993-07-01), Ono et al.
patent: 7120262 (2006-10-01), Klinke
patent: 2008/0152154 (2008-06-01), Daishin et al.

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