DocumentCode :
695613
Title :
A ray tracing simulation of sound diffraction based on analytic secondary source model
Author :
Okada, Masashi ; Onoye, Takao ; Kobayashi, Wataru
Author_Institution :
Grad. Sch. of Inf. Sci. & Tech., Osaka Univ., Suita, Japan
fYear :
2011
fDate :
Aug. 29 2011-Sept. 2 2011
Firstpage :
1653
Lastpage :
1657
Abstract :
In this paper, we propose a novel method to estimate impulse response of sound diffraction based on ray tracing. This method is a Monte Carlo solution of multiple integration in analytic secondary source model of edge-diffraction, in which sample values of the integrand are calculated by ray tracing process. Similarity between our method and general ray tracing makes it possible to utilize various approaches developed for ray tracing. In our implementation, a ray tracing engine OptiX is employed, which exhibits good acceleration on a graphics processor. For more efficiency, we use importance sampling where insignificant diffraction paths are eliminated stochastically and thus reducing the number of samples. Based on these approaches, the proposed method achieves a processing performance of about 24M samples/sec for the simulation of first-order diffraction, which demonstrates the applicability to interactive simulation.
Keywords :
Monte Carlo methods; acoustic waves; ray tracing; Monte Carlo solution; analytic secondary source model; edge-diffraction; first-order diffraction; graphics processor; ray tracing engine OptiX; ray tracing simulation; sound diffraction; Acoustics; Biological system modeling; Computational modeling; Diffraction; Monte Carlo methods; Ray tracing; Solid modeling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Conference, 2011 19th European
Conference_Location :
Barcelona
ISSN :
2076-1465
Type :
conf
Filename :
7073999
Link To Document :
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