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Personal audio with a planar bright zone

Coleman, P, Jackson, P, Olik, M and Pedersen, JA (2014) Personal audio with a planar bright zone Journal of the Acoustical Society of America, 136 (4). pp. 1725-1735.

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Reproduction of multiple sound zones, in which personal audio programs may be consumed without the need for headphones, is an active topic in acoustical signal processing. Many approaches to sound zone reproduction do not consider control of the bright zone phase, which may lead to self-cancellation problems if the loudspeakers surround the zones. Conversely, control of the phase in a least-squares sense comes at a cost of decreased level difference between the zones and frequency range of cancellation. Single-zone approaches have considered plane wave reproduction by focusing the sound energy in to a point in the wavenumber domain. In this article, a planar bright zone is reproduced via planarity control, which constrains the bright zone energy to impinge from a narrow range of angles via projection in to a spatial domain. Simulation results using a circular array surrounding two zones show the method to produce superior contrast to the least-squares approach, and superior planarity to the contrast maximization approach. Practical performance measurements obtained in an acoustically treated room verify the conclusions drawn under free-field conditions.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Vision Speech and Signal Processing
Authors :
Date : 1 October 2014
Identification Number : 10.1121/1.4893909
Additional Information : Copyright 2014 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 following article appeared in Journal of the Acoustical Society of America, 136 (4) and may be found at "
Depositing User : Symplectic Elements
Date Deposited : 24 Oct 2014 10:24
Last Modified : 01 Apr 2015 01:08

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