Adaptive room acoustic response simulation: a virtual 3D application

In this paper we propose a method to simulate a 3D acoustical environment in which sound sources are positioned in a well defined side. The spatial position that human brain assigns to a sound source is influenced by two main elements: the reverberation, which is related to many factors, including the distance of the source and the type of the environment, and the differences between the sound signals that reach the listener’s ears, related to the sound source angulation with respect to the listener’s head. All this elements have to be simulated in order to give the illusion that the instrument sound comes from a particular position in a particular environment. To obtain this result, the proposed method requires to get the stereo Impulse Response (IR) of the environment for each position that have to be simulated. Then, we approximate each IR by a corresponding adaptive IIR filter, that performs real-time operations.