Reproduction of personal sound zones can be attempted by sound field synthesis, energy control, or a combination of both. Energy control methods can create an unpredictable pressure distribution in the listening zone. Sound field synthesis methods may be used to overcome this problem, but tend to produce a lower acoustic contrast between the zones. Here, we present a cost function to optimize the cancellation and the plane wave energy over a range of incoming azimuths, producing a planar sound field without explicitly specifying the propagation direction. Simulation results demonstrate the performance of the methods in comparison with the current state of the art. The method produces consistent high contrast and a consistently planar target sound zone across the frequency range 80-7000Hz.
Coleman, Philip; Jackson, Philip; Olik, Marek; Pedersen, Jan Abildgaard
Affiliations: Bang & Olufsen A/S, Struer, Denmark; University of Surrey, Guildford, Surrey, UK(See document for exact affiliation information.)
AES Conference: 52nd International Conference: Sound Field Control - Engineering and Perception (September 2013)
Paper Number: 5-1
Publication Date: September 2, 2013
Subject: Sound Zones
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