10177

Large-Scale Sound Field Rendering in Rectangular Room with Specular Reflection

Takao Tsuchiya, Osamu Yamashita
Dept. of Information Systems Design, Doshisha University, Kyotanabe-shi, Kyoto 610-0321, Japan
20th International Congress on Sound and Vibration (ICSV20), 2013

@article{tsuchiya2013large,

   title={Large-Scale Sound Field Rendering in Rectangular Room with Specular Reflection},

   author={Tsuchiya, Takao and Yamashita, Osamu},

   year={2013}

}

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The sound field rendering is a technique to compute the sound field from the three-dimensional numerical models constructed in the computer, and it is the same concept as the graphics rendering in the computer graphics. In this paper, a GPU (Graphics Processing Unit) cluster system is applied to the sound field rendering for a large rectangular room simulation. The compact explicit-finite difference time domain (CE-FDTD) method is implemented on the GPU cluster system. The CE-FDTD method is a kind of the finite difference method in which the wave equation is compactly discretized based on the central differences. The GPU cluster system developed consists of eight PC nodes in which four GPUs are mounted respectively. The sound field renderings are performed for some large rectangular rooms with specular reflection, in which the impulse responses with a sampling rate of 40 kHz are calculated. The reverberation curves are calculated from the impulse responses, then compared with the approximate theory.
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