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Performance of optimized sound field control techniques in simulated and real acoustic environments.

Coleman, P, Mo̸ller, M, Olsen, M, Olik, M, Jackson, PJB and Pedersen, JA (2012) Performance of optimized sound field control techniques in simulated and real acoustic environments. J Acoust Soc Am, 131 (4: Aco). 3465 - 3465. ISSN 0001-4966

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Abstract

It is of interest to create regions of increased and reduced sound pressure ('sound zones') in an enclosure such that different audio programs can be simultaneously delivered over loudspeakers, thus allowing listeners sharing a space to receive independent audio without physical barriers or headphones. Where previous comparisons of sound zoning techniques exist, they have been conducted under favorable acoustic conditions, utilizing simulations based on theoretical transfer functions or anechoic measurements. Outside of these highly specified and controlled environments, real-world factors including reflections, measurement errors, matrix conditioning and practical filter design degrade the realizable performance. This study compares the performance of sound zoning techniques when applied to create two sound zones in simulated and real acoustic environments. In order to compare multiple methods in a common framework without unduly hindering performance, an optimization procedure for each method is first used to select the best loudspeaker positions in terms of robustness, efficiency and the acoustic contrast deliverable to both zones. The characteristics of each control technique are then studied, noting the contrast and the impact of acoustic conditions on performance.

Item Type: Article
Additional Information: Copyright (2012) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The article appeared in Journal Of Acoustic Society of America, 2012, 131(4), pp.3465-3465 and may be found at the journal website.
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Vision Speech and Signal Processing
Depositing User: Symplectic Elements
Date Deposited: 02 Oct 2012 08:57
Last Modified: 23 Sep 2013 19:28
URI: http://epubs.surrey.ac.uk/id/eprint/567081

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