AUGMENTED ELLIPTICAL MICROPHONE ARRAY

摘要

In one embodiment, an audio system has a microphone array and a signal processing subsystem that processes audio signals generated by the microphone array to produce an output beampattern. The microphone array has (i) a first microphone set of two or more microphones located on a first ellipse, (ii) a second microphone set of two or more microphones located on a second ellipse within the first ellipse, and (iii) a third microphone set of one or more microphones located within the second ellipse, where the microphones in the first, second, and third microphone sets are effectively all in one plane. The signal processing subsystem has (1) a decomposer that spatially decomposes the microphone audio signals to generate a plurality of eigenbeams and (2) a beamformer that generates the output beampattern as a weighted sum of the eigenbeams.

主权项

1. An audio system comprising a microphone array, the microphone array comprising:
a first microphone set of two or more microphones located on a first ellipse; a second microphone set of two or more microphones located on a second ellipse within the first ellipse; and a third microphone set of one or more microphones located within the second ellipse, wherein the microphones in the first, second, and third microphone sets are effectively all in one plane.