Patent ID: 6694028
Filing Date: 2004-02-17
Classification: H04R

Abstract:
A microphone array system including a plurality of microphones and a signal processing unit, comprising:at least one microphone arranged along each axis direction on rectangular coordinates; and a received sound signal processing part for performing processing of sound signals received at the plurality of microphones, having a directional sound signal calculating function, which is essential, for estimating a directional sound signal to an arbitrary direction based on the received sound signal with a unidirectivity or bidirectivity pattern along each axis direction, and further having at least one function of other sound signal processing functions at the same time; wherein the plurality of microphones are non-directional microphones at least two non-directional microphones are arranged in a first axis direction, at least two non-directional microphones are arranged in a second axis direction that is orthogonal to the first axis, and the received sound signal processing part has a function for calculating a directional sound signal to an arbitrary direction based on a unidirectional estimated sound signal to a positive direction on the first axis and a bidirectional estimated sound signal to positive and negative directions on the second axis.