We present a new approach to efficiently compute effects of sound occlusion and diffraction to obstacles in general virtual acoustic environments. Based on the Fresnel-Kirchoff approximation to diffraction, our method uses a 3-D model of the environment and computer graphics hardware to evaluate diffraction effects between a sound source and a receiver position. No further hypothesis is needed on the diffracting domain. This method allows us to compute attenuation data and filters which can then be used for auralization. The method can also be extended to indirect sound propagation paths.
Authors:
Tsingos, Nicolas; Gascuel, Jean-Dominique
Affiliation:
iMAGIS/GRAVIR-IMAG, Grenoble, France
AES Convention:
104 (May 1998)
Paper Number:
4699
Publication Date:
May 1, 1998
Subject:
Audio in Virtual Reality Systems
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