Visual Diffraction / The basic idea of Image-Source Method

Ville Pulkki
Laboratory of Acoustics and Audio Signal Processing
Helsinki University of Technology

In image source method the acoustic effect of a surface can be introduced by using mirror image sources. Here is an example with one wall, source and receiver:






When there are more surfaces and they surround a receiver, there will be more mirror image sources. A sound ray may be reflected by multiple surfaces before arriving to a listener:




In this case, there should be infinite number of mirror image sources. However, only few of them are visualized.

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Last modified: 20.02.2003
Author: <Ville.Pulkki@hut.fi>