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It has been suggested that beam-steering microphone arrays may provide considerable improvements over conventional directional microphones. This paper describes some of the relevant acoustic factors, and relates them to two basic methodologies of array beam-forming: source isolation/tracking and interference null steering. The basic theory of beam-forming is then reviewed, and methods of predicting array performance suggested. Results from practical work implementing an adaptive source isolation system in anechoic conditions are described, strongly validating proposed theory. Finally, deteriorated array performance in a real-room environment is presented, confirming the acoustic problems highlighted.
Author (s): Angus, James A.;
Kershaw, Simon;
Lewis, Alwyn;
Affiliation:
The University of York, Heslington, York, UK ; Kings College, London, UK ; BT Labs, Martlesham Heath, Ipswich, UK
(See document for exact affiliation information.)
AES Convention: 95
Paper Number:3761
Publication Date:
1993-10-06
Session subject:
Microphones and Loudspeakers
DOI:
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Angus, James A.; Kershaw, Simon; Lewis, Alwyn; 1993; An Adaptive Beam-Steering Microphone Array Implemented on the Motorola DSP56000 Digital Signal Processor [PDF]; The University of York, Heslington, York, UK ; Kings College, London, UK ; BT Labs, Martlesham Heath, Ipswich, UK; Paper 3761; Available from: https://aes.org/publications/elibrary-page/?id=6472
Angus, James A.; Kershaw, Simon; Lewis, Alwyn; An Adaptive Beam-Steering Microphone Array Implemented on the Motorola DSP56000 Digital Signal Processor [PDF]; The University of York, Heslington, York, UK ; Kings College, London, UK ; BT Labs, Martlesham Heath, Ipswich, UK; Paper 3761; 1993 Available: https://aes.org/publications/elibrary-page/?id=6472
@inproceedings{Angus1993an,
title={{An Adaptive Beam-Steering Microphone Array Implemented on the Motorola DSP56000 Digital Signal Processor}},
author={Angus, James A. and Kershaw, Simon and Lewis, Alwyn},
year={1993},
month={oct},
booktitle={Journal of the Audio Engineering Society},
publisher={Paper 3761; AES Convention 95; October 1993},
number={3761},
organization={AES},
}
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