Performance of Low Frequency Sound Zones Based on Truncated Room Impulse Responses

José Cadavid, Martin Møller, Søren Bech, Toon van Waterschoot, Jan Østergaard

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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Abstract

Using spatially distributed loudspeakers and properly designed control filters, it is possible to generate sound zones that play dif- ferent audio contents in different regions of the same room. For low frequency content, the design of control filters relies on the room impulse responses (RIRs) between each loudspeaker and the desired listening positions. Estimates of the RIRs can be obtained by distributing wireless microphones within the sound zones and thereby systematically acquiring sufficient knowledge about the acoustical characteristics of the room and loudspeakers. Longer ac- quisition times would generally lead to better estimates of the RIRs but would also introduce processing delays, which is undesirable in cases where time-varying RIRs are to be compensated. In addition, shorter RIRs may imply lower computational complexity.
In this work, control filters were calculated using truncated ver- sions of the RIRs in order to simulate the effect of a reduced acquisi- tion time. The performance was evaluated in terms of the acoustic contrast ratio (ACR) and it was seen that within a certain limit, doubling the acquisition time increases the ACR around 4 dB or more. Moreover, to keep the sound pressure low in the dark zone, only a limited part of the reverberation tail is required.
OriginalsprogEngelsk
TitelProceedings of the 17th International Audio Mostly Conference : What You Hear is What You See? Perspectives on Modalities in Sound and Music Interaction, AM 2022
Antal sider7
UdgivelsesstedSt. Pölten, Austria
ForlagAssociation for Computing Machinery (ACM)
Publikationsdato6 sep. 2022
Sider239-245
ISBN (Elektronisk)978-1-4503-9701-8
DOI
StatusUdgivet - 6 sep. 2022
Begivenhed17th International Audio Mostly Conference - St. Pölten, Østrig
Varighed: 6 sep. 20229 sep. 2022

Konference

Konference17th International Audio Mostly Conference
Land/OmrådeØstrig
BySt. Pölten
Periode06/09/202209/09/2022

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