Apparatus and method for controlling sound field

Abstract

The present disclosure teaches a filtering unit configured to perform filtering on input audio signals in accordance with coefficients set for a plurality of audio outputs, respectively, and a plurality of speakers configured to output audio in response to audio signals filtered for the plurality of audio outputs. The filtering unit performs the filtering on the input audio signals in accordance with the coefficients adjusted so that the sound pressures and the sound pressure gradients at a plurality of control points set on a boundary plane of an enclosed space surrounding the plurality of speakers reach values corresponding to a desired sound field. This allows producing a desired sound field on the boundary plane of the enclosed space surrounding the sound sources by making use of the properties of the Kirchhoff-Helmholtz integral equation that requires that the sound sources are present in an enclosed space.

Dependencies are inferred from the claim text.