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Analysis of Near-Field Effects of Wave Field Synthesis Using Linear Loudspeaker Arrays

Wave field synthesis (WFS) is a technique allowing the reproduction of sound fields in an extended listening area. This paper describes the theoretical fundamentals of WFS using linear loudspeaker arrays. A spatio-temporal frequency domain analysis of the reproduced wave field reveals that not only the desired wave field is present in the listening area but also an additional near-field component. This component is analyzed in detail and the resulting wave fields are illustrated. Practical realizations of WFS impose certain technical constraints, namely the application of a finite number of discrete loudspeakers. The impact of this spatial discretization and truncation of the secondary source distribution on the near-field component is derived.

Authors: Ahrens, Jens; Spors, Sascha
Affiliation: Deutsche Telekom Laboratories
AES Conference:30th International Conference: Intelligent Audio Environments (March 2007)
Paper Number:29 Import into BibTeX
Subject:Intelligent Audio Environments

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