Patent ID: 6526147
Filing Date: 2003-02-25
Classification: H04R

Abstract:
A microphone array comprising:multiple individual microphones arranged in pairs and disposed in an elongated housing, the individual microphones in each pair are disposed on opposing sides of a centerline of the microphone array and the microphones on opposing sides of the centerline are positioned at different distances from the centerline; a summation link for summing signals from the microphones to form an output signal of the microphone array; and low pass filters operatively coupled between the microphones and the summation link, wherein associated microphone pairs are connected to low-pass filters having identical cut-off frequencies and the cut-off frequencies are different for each microphone pair, and further wherein cut-off frequencies of low-pass filters associated with microphone pairs disposed distant from the centerline are lower than cut-off frequencies of low pass filters associated with microphone pairs disposed proximate the centerline, wherein cut-off frequencies for low-pass filters associated with microphone pairs mutually correspond to distances between microphone pairs and the centerline of the microphone array.