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Reproducing Sound Fields Using MIMO Acoustic Channel Inversion

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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.

JAES Volume 59 Issue 10 pp. 721-734; October 2011
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AES - Audio Engineering Society