| 摘要 |
PROBLEM TO BE SOLVED: To provide a microphone array device having directivity even to a plurality of arbitrary sound sources without performing any complex signal processing by reducing an operation load in the microphone array device, when achieving directivity to an arbitrary sound source position. SOLUTION: A plurality of microphones 11-1 to 11-n are arranged rotary-symmetrically, thus obtaining uniform directional characteristics in any direction. Additionally, a plurality of directivities are realized. Further, signal processing to a voice signal from respective microphones 11-1 to 11-n can be made by the same algorithm, thus estimating a sound source position and controlling directivity by the same algorithm. Since signal processing to each sound reception signal is made by the same algorithm, the operation load is reduced. COPYRIGHT: (C)2007,JPO&INPIT
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