Simulating Sound Waves
An interesting article on rendering at PhysicsWeb ends by suggesting the possibility of simulating sound waves in complex geometries (in a similar way to simulating light rays).
http://physicsweb.org/articles/world/17/2/6
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From a physics point of view we would also like to leave geometric optics behind and use the wave nature of light rays instead. As well as allowing us to simulate the visual effects of interference, this opens up the possibility of simulating sound waves in complex geometries. Architects, for example, might eventually be able to use such software to optimize noise pollution in their buildings.About the author
Jürgen K Singer is a research scientist in rendering at mental images, Berlin, Germany, e-mail jsinger@mental.com
This could be interesting, but perhaps as a means to minimise noise pollution rather than to optimise it 
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