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Guided Multiview Ray Tracing for Fast Auralization

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6 Author(s)
Taylor, M. ; Dept. of Comput. Sci., Univ. of North Carolina, Chapel Hill, NC, USA ; Chandak, A. ; Qi Mo ; Lauterbach, C.
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We present a novel method for tuning geometric acoustic simulations based on ray tracing. Our formulation computes sound propagation paths from source to receiver and exploits the independence of visibility tests and validation tests to dynamically guide the simulation to high accuracy and performance. Our method makes no assumptions of scene layout and can account for moving sources, receivers, and geometry. We combine our guidance algorithm with a fast GPU sound propagation system for interactive simulation. Our implementation efficiently computes early specular paths and first order diffraction with a multiview tracing algorithm. We couple our propagation simulation with an audio output system supporting a high order interpolation scheme that accounts for attenuation, cross fading, and delay. The resulting system can render acoustic spaces composed of thousands of triangles interactively.

Published in:

Visualization and Computer Graphics, IEEE Transactions on  (Volume:18 ,  Issue: 11 )

Date of Publication:

Nov. 2012

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