Patent ID: 8000482
Filing Date: 2011-08-16
Classification: H04R

Abstract:
1. A microphone array processing system for performance enhancement in noisy environments, the system comprising: a plurality of N microphones positioned to detect speech from a speech source and noise from at least one noise source and to generate corresponding microphone output signals, where N is a positive integer denoting a number of the plurality of microphones, one of the N microphones being designated a reference microphone and the other N−1 microphones being designated data microphones, the reference microphone and the data microphones receive acoustic signals both from the speech source and from the at least one noise source; a plurality of adaptive filters, one for each of the data microphones, for aligning each data microphone output signal relative to the reference microphone output signal; and a signal summation circuit that sums the adaptively filtered microphone output signals with the reference microphone output signal such that signal components resulting from the speech source combine coherently to provide a speech signal having a power gain of approximately N