公开(公告)号：US20030147539A1

公开(公告)日：2003-08-07

申请号：US10315502

申请日：2002-12-10

申请人： MH Acoustics, LLC, a Delaware corporation

发明人： Gary W. Elko ,  Robert A. Kubli ,  Jens M. Meyer

IPC分类号： H04R003/00 ,  H03G005/00

CPC分类号： H04R5/027 ,  H04R3/005 ,  H04R2201/401 ,  H04S3/00 ,  H04S2400/15

摘要： A microphone array-based audio system that supports representations of auditory scenes using second-order (or higher) harmonic expansions based on the audio signals generated by the microphone array. In one embodiment, a plurality of audio sensors are mounted on the surface of an acoustically rigid sphere. The number and location of the audio sensors on the sphere are designed to enable the audio signals generated by those sensors to be decomposed into a set of eigenbeams having at least one eigenbeam of order two (or higher). Beamforming (e.g., steering, weighting, and summing) can then be applied to the resulting eigenbeam outputs to generate one or more channels of audio signals that can be utilized to accurately render an auditory scene. Alternative embodiments include using shapes other than spheres, using acoustically soft spheres and/or positioning audio sensors in two or more concentric patterns.