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Summary: 2009 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics October 18-21, 2009, New Paltz, NY
MULTIZONE 2D SOUNDFIELD REPRODUCTION VIA SPATIAL BAND STOP FILTERS
Yan Jennifer Wu & Thushara D. Abhayapala
Applied Signal Processing Group, Dept of Information Engineering
Research School of Information Sciences & Engineering
The Australian National University
Email: jennifer.wu@rsise.anu.edu.au, thushara.abhayapala@anu.edu.au
ABSTRACT
Any attempt to create multiple independent soundfields in separate
zones over an extended region of open space results in unintended
interference in a given zones from other zones. In this paper, we
design spatial band stop filters to suppress interzone interference
in the regions of interests and pass the desired soundfields with no
distortion. This is achieved by using the higher order spatial har-
monics of one zone to cancel the undesirable effects of the lower
order harmonics of the same zone on the other zones. We illustrate
the work by designing and simulating a 2D two-zone soundfield.
Index Terms-- soundfield reproduction, multizone, cylindri-
cal harmonic expansions, spatial band stop filters.
1. INTRODUCTION
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