Weighted Personal Sound Zone (Multizone Soundfield Reproduction) (Spatial Audio)
This animation is an example of a reproduction of multizone spatial audio using loudspeakers to create personal sound zones. The circular zone on the left shows a bright zone with a desired 2kHz planewave at an angle of 15°. The circular zone on the right shows the quiet zone which has the desired bright zone signal directed towards it. This is known as the multizone occlusion problem.
The error induced by the occlusion problem is varied as the weighting of the zones changes their relative importance in the reproduction. The weighting is minimum at the beginning and end of the animation and maximum half way through.
The large black circle is the reproduction area to be controlled. The black and white circles on the left represent 32 loudspeakers (point sources) starting at 180° and continuing to 264°. The size in space of this spatial audio system can be seen from the measurements on the axes.
The desired soundfield was synthesised using the technique described in the paper "Multizone Soundfield Reproduction using Orthogonal Basis Expansion" by Wenyu Jin, W. Bastiaan Kleijn and David Virette.
The reproduction was synthesised using the technique described in the paper "Theory and Design of Soundfield Reproduction using Continuous Loudspeaker Concept" by Yan Jennifer WU and Thushara D. Abhayapala