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/content/asa/journal/jasa/136/3/10.1121/1.4892669
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/content/asa/journal/jasa/136/3/10.1121/1.4892669
2014-08-06
2016-09-27

Abstract

This paper describes a technique for designing a collection of beamformers, a “beamformer bank,” that approximately produces a constant-amplitude panning law. Useful in multichannel audio recording scenarios, a point source will appear with energy above a specified sidelobe level in at most two adjacent beams, and the sum of all beam signals will approximate the source signal. A design method is described in which a specified sidelobe level determines beamwidth as a function of arrival direction and frequency, leading directly to the number and placement of beams at each frequency. Simulation results are presented verifying the proposed technique's performance.

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