On in situ beamforming in an automotive cabin using a planar loudspeaker array

Martin Bo Møller, Martin Olsen

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

2 Citationer (Scopus)
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Compact loudspeaker arrays are often used in applications where control of the sound dispersion is required, e.g. in audio reproduction systems and aspects of sound field control. An example of the latter is sound zoning where
the goal is to deliver individual audio content to one listener without disturbing another. Typical approaches are based on filter-and-sum beamforming applied to control the resulting directivity of the array. However,
directivity is defined in free field while sound zones are generally of interest in listening spaces with reflective boundaries such as domestic rooms and automotive cabins. In order to address this discrepancy, in situ zonal
control can be utilized. This relies on measured impulse responses from each array element to the spatial control points defining the zones. Such methods increase the solution specificity and can lead to non-causal control
filters. In the present paper, methods based on controlling the flow of acoustic energy are applied to a planar loudspeaker array located on the dashboard inside a car cabin. A comparison study including directivity and
in situ zone control is presented, and the solutions are evaluated in terms of spatial robustness of the resulting
sound zoning performance.
TitelProceedings of the ICA 2019 and EAA Euroregio : 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019,
Antal sider8
ForlagDeutsche Gesellschaft für Akustik
Publikationsdato9 sep. 2019
ISBN (Elektronisk)978-3-939296-15-7
StatusUdgivet - 9 sep. 2019
Begivenhed23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019 - Aachen , Tyskland
Varighed: 9 sep. 201913 sep. 2019


Konference23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019
NavnInternational Congress on Acoustics - Proceedings