Is a
Patent attributes
Current Assignee
0
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yoshikazu Takahashi0
Nobuyuki Kihara0
Yasuhiko Kato0
Date of Patent
August 2, 2011
0Patent Application Number
113530880
Date Filed
February 14, 2006
0Patent Primary Examiner
Patent abstract
A microphone apparatus for processing and outputting an output signal of a microphone array including at least nine microphones includes a directivity function processing circuit that converts the output signal of the microphone array into a unidirectional signal and that outputs the unidirectional signal. The directivity function processing circuit expands a directivity function whose variable is an incident angle of an acoustic wave into a Fourier series up to at least third order. The variable in the expanded expression is produced from output signals of the microphones forming the microphone array.
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