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Proceedings Paper

DSP implementation of source location using microphone arrays
Author(s): Daniel V. Rabinkin; Richard J. Renomeron; A. J. Dahl; Joseph C. French; James L. Flanagan; Mike Bianchi
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Paper Abstract

The design, implementation, and performance of a low-cost, real-time DSP system for source location is discussed. The system consists of an 8-element electret microphone array connected to a Signalogic DSP daughterboard hosted by a PC. The system determines the location of a speaker in the audience in an irregularly shaped auditorium. The auditorium presents a non-ideal acoustical environment; some of the walls are acoustically treated, but there still exists significant reverberation and a large amount of low frequency noise from fans in the ceiling. The source location algorithm is implemented in a two step process. The first step determines time delay of arrival (TDOA) for select microphone pairs. A modified version of the Cross- Power Spectrum Phase Method is used to compute TDOAs and is implemented on the DSP daughterboard. The second step uses the computed TDOAs in a least mean squares gradient descent search algorithm implemented on the PC to compute a location estimate.

Paper Details

Date Published: 22 October 1996
PDF: 12 pages
Proc. SPIE 2846, Advanced Signal Processing Algorithms, Architectures, and Implementations VI, (22 October 1996); doi: 10.1117/12.255464
Show Author Affiliations
Daniel V. Rabinkin, Rutgers Univ. (United States)
Richard J. Renomeron, Rutgers Univ. (United States)
A. J. Dahl, Rutgers Univ. (United States)
Joseph C. French, Rutgers Univ. (United States)
James L. Flanagan, Rutgers Univ. (United States)
Mike Bianchi, Bell Communications Research (United States)

Published in SPIE Proceedings Vol. 2846:
Advanced Signal Processing Algorithms, Architectures, and Implementations VI
Franklin T. Luk, Editor(s)

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