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TitlePersonal sound zones: Delivering interface-free audio to multiple listeners
Publication TypeJournal Article
Year of Publication2015
AuthorsBetlehem, T., Zhang W., Poletti M.A., and Abhayapala T.D.
JournalIEEE Signal Processing Magazine
Pagination81 - 91
Date Published2015
ISSN10535888 (ISSN)
KeywordsAcoustic field measurement, Acoustic fields, acoustics, Architectural acoustics, Audio acoustics, Audio processing, Control techniques, Conventional techniques, Directional sources, Field representations, Loudspeakers, Minimum interference, Optimization, Optimization problems, Unified framework
AbstractSound rendering is increasingly being required to extend over certain regions of space for multiple listeners, known as personal sound zones, with minimum interference to listeners in other regions. In this article, we present a systematic overview of the major challenges that have to be dealt with for multizone sound control in a room. Sound control over multiple zones is formulated as an optimization problem, and a unified framework is presented to compare two state-of-the-art sound control techniques. While conventional techniques have been focusing on point-to-point audio processing, we introduce a wave-domain sound field representation and active room compensation for sound pressure control over a region of space. The design of directional loudspeakers is presented and the advantages of using arrays of directional sources are illustrated for sound reproduction, such as better control of sound fields over wide areas and reduced total number of loudspeaker units, thus making it particularly suitable for establishing personal sound zones. © 2014 IEEE.

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