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Robust FIR Filters for Wireless Low-frequency Sound Zones

Citation Author(s):
Jan Ostergaard, Martin Bo Møller, Christian Sejer Pedersen
Submitted by:
SigPort Admin .
Last updated:
31 May 2023 - 3:11pm
Document Type:
Document Year:
Mo Zhou
Paper Code:

Low frequency personal sound zones can be created by controlling the sound pressure in separate spatially confined regions. The performance of a sound zone system using wireless communication may be degraded due to potential packet losses. In this paper, we propose robust FIR filters for low-frequency sound zone system by incorporating information about the expected packet losses into the design. A simulation study with eight loudspeakers surrounding two control regions shows that the proposed filters can improve the contrast and the sound quality when packet losses occur, with only a slight degradation in performance even when there is no packet loss. With the proposed filters, it is possible to gain 2 dB higher contrast on average across the frequency range 20-200Hz relative to the original filters when packet loss rate is 5%.

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