Extending the Area Silenced by Active Noise Control Using Multiple Loudspeakers. IEEE ICASSP 2012

Extending the Area Silenced by Active Noise Control Using Multiple Loudspeakers.

Annea Barkefors , Simon Berthilsson and Mikael Sternad , Uppsala University.

IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2012, Kyoto, Japan, March 2012.
© 2012 IEEE

Also presented at the Swedish Control Meeting "Reglermöte" , Uppsala, June 2012.

Abstract:

Active noise control is of increasing interest in e.g. cars, but the zone of noise damping becomes limited in reverberant environments. We investigate the possibility of extending this spatial zone significantly, by using multiple control loudspeakers.

MIMO feedforward controllers designed by linear quadratic control theory are here shown to increase the limiting frequency for uniform damping in a 0.3×0.3 m test area, from 200 Hz to around 600 Hz.

Related publications:

Licentiate thesis by Annea Barkefors, May 2014

Paper at ACC 2012 on corresponding design for car interiors

Paper in IEEE TASLP 2014, describing the design and performance in more details.

Robust Sound Field Control for Audio Reproduction. A polynomial approach to discrete-time acoustic modeling and filter design.
PhD Thesis by Lars-Johan Brännmark, 2011.

Source:

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