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TitleAn approach to generating two zones of silence with application to personal sound systems
Publication TypeJournal Article
Year of Publication2015
AuthorsPoletti, M.A., and Fazi F.M.
JournalJournal of the Acoustical Society of America
Pagination598 - 605
Date Published2015
ISSN00014966 (ISSN)
KeywordsAcoustic field measurement, Acoustic fields, acoustics, Arbitrary positions, Direction of arrival, Independent sound fields, Interference suppression, Low order, Multizone, Sound reproduction systems, Sound systems, Sound zones
AbstractAn application of current interest in sound reproduction systems is the creation of multizone sound fields which produce multiple independent sound fields for multiple listeners. The challenge in producing such sound fields is the avoidance of interference between sound zones, which is dependent on the geometry of the zone and the direction of arrival of the desired sound fields. This paper provides a theoretical basis for the generation of two zones based on the creation of sound fields with nulls and the positioning of those nulls at arbitrary positions. The nulls are created by suppressing low-order mode terms in the sound field expansion. Simulations are presented for the two-dimensional case which shows that suppression of interference is possible across a broad frequency audio range. © 2015 Acoustical Society of America.

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