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Reproducing Sound Fields Using MIMO Acoustic Channel Inversion

There are many ways to reproduce a sound field over a wide spatial area using an array of loudspeakers, as for example, wavefield synthesis (WFS), ambisonics, and spectral division methods. A new approach, called sound field reconstruction (SFR), optimally reproduces a desired sound field in a given listening area while keeping loudspeaker driver signals within physical constraints. The reproduction of a continuous sound field is represented as an inversion of the discrete acoustic channel from a loudspeaker array to a grid of control points. Extensive simulations comparing WFS, which is the state of the art, with SFR show that on average SFR provides better reproduction accuracy.

Authors: Kolundzija, Mihailo; Faller, Christof; Vetterli, Martin
Affiliation: School of Computer and Communications Sciences, Ecole Polytechnique Fédérale Lausanne (EPFL), Lausanne, Switzerland
JAES Volume 59 Issue 10 pp. 721-734; October 2011 Import into BibTeX

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