A simple adaptive cardioid direction finding algorithm

A simple direction-finding algorithm using three or four omnidirectional microphones is described. The algorithm is based on the minimization of the output power of a generally steerable cardioid microphone. It is shown that the algorithm can be reduced to running three independent single-tap LMS fi...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2013-11, Vol.134 (5_Supplement), p.4185-4185
Main Authors: Elko, Gary W., Meyer, Jens
Format: Article
Language:English
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Summary:A simple direction-finding algorithm using three or four omnidirectional microphones is described. The algorithm is based on the minimization of the output power of a generally steerable cardioid microphone. It is shown that the algorithm can be reduced to running three independent single-tap LMS filters for the general 3D case and two independent single-tap LMS adaptive filters for the 2D (null constrained to lie in a plane). Results will also be shown for a 32-element spherical microphone array for sources corrupted with microphone self-noise and reverberation.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.4831346