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Finite-difference time-domain simulation of low-frequency room acoustic problems

Botteldooren, D.

The Journal of the Acoustical Society of America, 1995-12, Vol.98 (6), p.3302-3308 [Periódico revisado por pares]

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Título:
Finite-difference time-domain simulation of low-frequency room acoustic problems
Autor: Botteldooren, D.
É parte de: The Journal of the Acoustical Society of America, 1995-12, Vol.98 (6), p.3302-3308
Descrição: This paper illustrates the use of a numerical time-domain simulation based on the finite-difference time-domain (FDTD) approximation for studying low- and middle-frequency room acoustic problems. As a direct time-domain simulation, suitable for large modeling regions, the technique seems a good ‘‘brute force’’ approach for solving room acoustic problems. Some attention is paid in this paper to a few of the key problems involved in applying FDTD: frequency-dependent boundary conditions, non-Cartesian grids, and numerical error. Possible applications are illustrated with an example. An interesting approach lies in using the FDTD simulation to adapt a digital filter to represent the acoustical transfer function from source to observer, as accurately as possible. The approximate digital filter can be used for auralization experiments.
Idioma: Inglês

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