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Improved adjustable boundary condition for the 3-D digital waveguide mesh

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1 Author(s)
Kelloniemi, A. ; Telecommun. Software & Multimedia Lab., Helsinki Univ. of Technol., Espoo, Finland

The digital waveguide (DWG) mesh is a method for simulating wave propagation in multiple dimensions. In three-dimensional form it can be used for modeling room acoustics or resonating bodies of musical instruments, for example. Until now boundary conditions in the three-dimensional DWG mesh have been implemented using methods originating from the updating functions of a one-dimensional digital waveguide. A new boundary structure, which better takes into account the 3-D mesh topology, is now introduced. With this new method, the reflection magnitude is shown to match the desired value over a much wider range of reflection coefficient values than with the earlier method.

Published in:

Applications of Signal Processing to Audio and Acoustics, 2005. IEEE Workshop on

Date of Conference:

16-19 Oct. 2005