Apparatus and method for determining virtual sound source

An acoustic image source model for early reflections is generated by iteratively mirroring (305) a room around boundaries (e.g., walls) of a previously iterated room. A boundary to be mirrored to its surroundings in each iteration is determined (303) by specific selection criteria. The selection criterion comprises the following requirements: the mirror image direction cannot be reversed; not in the exclusion direction; and the method cannot be repeated unless in a series of continuous mirror image processing. 通过将房间迭代地镜像处理(305)在先前迭代的房间的边界(例如，墙壁)周围来生成针对早期反射的声学图像源模型。通过特定的选择准则来确定(303)在每次迭代中要镜像处理到其周围的边界。所述选择准则包括以下要求：不能逆转镜像方向；不能在排除的方向上；并且不能重复，除非在一系列连续的镜像处理中。