Spatial Multizone Soundfield Reproduction using Higher Order Loudspeakers

Abstract

Spatial multizone sound field reproduction aims to regenerate desired sound fields as multiple independent sound fields in isolated zones without unpremeditated interference within a zone from other zones. Such attempts over an extended region of open have proved to be quite arduous and intricate. At high frequencies, significantly large numbers of loudspeakers are required for the reproduction of the sound field over significant areas. This thesis is aimed at using higher order (up to 𝑁th) loudspeakers, with polar responses up to cos (𝑁𝜙) and sin (𝑁𝜙) to resolve the high frequency reproduction issue. The thesis includes the design of the system along with any equations derived to verify the performance of the system for arbitrary sound fields. The equations have been defined with respect to the frequency content of the sound fields and the order and number of sources used. Numerical simulations to verify the equations and corresponding results have also been included.