Variable Source Radiation Pattern Synthesis for use in Two-Dimensional Sound Reproduction

Martin Morrell; Joshua Reiss
DAFx-2012 - York
In this paper the authors present an approach for two-dimensional sound reproduction using a circular layout of speakers where the gains are obtained from a variable polar pattern. The method presented here has the ability to be variable-order whilst keeping the same key features of a base polar pattern. Comparisons are drawn between the new approach and a previous approach by the authors using variable-order, variable-decoder Ambisonics. The new method is found to not be as directional as the Ambisonics approach, yet it maintains the base polar pattern unlike with Ambisonics. Whilst both approaches have two variable parameters the new approach’s parameters are independent and are therefore intuitive to an end user using such a tool as a spatialisation effect as well as technique.