Patent ID: 7801313
Filing Date: 2010-09-21
Classification: H04R,H04S

Abstract:
1. A method for reproducing an audio signal to generate an area of approximately constant sound volume, comprising the steps of: supplying to a first loudspeaker array a first audio signal corresponding to a right channel, to perform wavefront synthesis, the first loudspeaker array comprising a first plurality of loudspeakers arranged substantially in a plane; producing a first virtual sound source corresponding to the first audio signal at an infinite distance from the first loudspeaker array using wavefront synthesis; producing a first planar sound wave from the first loudspeaker array corresponding to the first audio signal; supplying to a second loudspeaker array a second audio signal corresponding to a left channel, to perform wavefront synthesis, the second loudspeaker array comprising a second plurality of loudspeakers arranged substantially co-planar with the first plurality of loudspeakers of the first loudspeaker array and to the right of the first plurality of loudspeakers from the perspective of an intended listener; producing a second virtual sound source corresponding to the second audio signal at an infinite distance from the second loudspeaker array using wavefront synthesis; and producing a second planar sound wave from the second loudspeaker array corresponding to the second audio signal, wherein a propagation direction of the first planar sound wave obtained from the first virtual sound source and a propagation direction of the second planar sound wave obtained from the second virtual sound source cross each other.