Open Access

Synthesis of Directional Sources Using Wave Field Synthesis, Possibilities, and Limitations

EURASIP Journal on Advances in Signal Processing20072007:090509

https://doi.org/10.1155/2007/90509

Received: 28 April 2006

Accepted: 4 December 2006

Published: 21 February 2007

Abstract

The synthesis of directional sources using wave field synthesis is described. The proposed formulation relies on an ensemble of elementary directivity functions based on a subset of spherical harmonics. These can be combined to create and manipulate directivity characteristics of the synthesized virtual sources. The WFS formulation introduces artifacts in the synthesized sound field for both ideal and real loudspeakers. These artifacts can be partly compensated for using dedicated equalization techniques. A multichannel equalization technique is shown to provide accurate results thus enabling for the manipulation of directional sources with limited reconstruction artifacts. Applications of directional sources to the control of the direct sound field and the interaction with the listening room are discussed.

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Authors’ Affiliations

(1)
IRCAM, Paris, France
(2)
Sonic Emotion, Oberglatt, Switzerland

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Copyright

© E. Corteel. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.