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Conference paper

A beamforming system based on the acousto-optic effect

In Proceedings - European Conference on Noise Control — 2012, pp. 1048-1053

By Torras Rosell, Antoni1,2; Barrera Figueroa, Salvador1,2; Jacobsen, Finn1,2

From

Department of Electrical Engineering, Technical University of Denmark1

Acoustic Technology, Department of Electrical Engineering, Technical University of Denmark2

Beamforming techniques are usually based on microphone arrays. The present work uses a beam of light as a sensor element, and describes a beamforming system that locates sound sources based on the acousto-optic effect, this is, the interaction between sound and light. The use of light as a sensing element makes this method immune to spatial aliasing.

This feature is illustrated by means of simulation and experimental results. For ease of comparison, the study is supplemented with results obtained with a line array of microphones

Language: English
Publisher: European Acoustics Association
Year: 2012
Pages: 1048-1053
Proceedings: Ninth European Conference on Noise Control
ISBN: 8001050130 and 9788001050132
Types: Conference paper
Keywords

Acoustic variables control Acousto-optic effect Beamforming Beamforming technique Line arrays Microphone arrays Microphones Sensing elements Sensor elements Sound source Spatial aliasing.

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