Finite Difference Time Domain Modeling of Phase Grating Diffusion
Kowalczyk K, van Walstijn M (2010)
Publication Language: English
Publication Type: Conference contribution
Publication year: 2010
Pages Range: 1-4
Conference Proceedings Title: Proceedings of the 4th International Symposium on Communications, Control and Signal Processing, ISCCSP 2010
Event location: Limassol
ISBN: 978-1-4244-6287-2
DOI: 10.1109/ISCCSP.2010.5463366
Abstract
In this paper, a method for modeling diffusion caused by non-smooth boundary surfaces in simulations of room acoustics using finite difference time domain (FDTD) technique is investigated. The proposed approach adopts the well-known theory of phase grating diffusers to efficiently model sound scattering from rough surfaces. The variation of diffuser well-depths is attained by nesting allpass filters within the reflection filters from which the digital impedance filters used in the boundary implementation are obtained. The presented technique is appropriate for modeling diffusion at high frequencies caused by small surface roughness and generally diffusers that have narrow wells and infinitely thin separators. The diffusion coefficient was measured with numerical experiments for a range of fractional Brownian diffusers.
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How to cite
APA:
Kowalczyk, K., & van Walstijn, M. (2010). Finite Difference Time Domain Modeling of Phase Grating Diffusion. In Proceedings of the 4th International Symposium on Communications, Control and Signal Processing, ISCCSP 2010 (pp. 1-4). Limassol, CY.
MLA:
Kowalczyk, Konrad, and M. van Walstijn. "Finite Difference Time Domain Modeling of Phase Grating Diffusion." Proceedings of the 4th International Symposium on Communications, Control and Signal Processing (ISCCSP), Limassol 2010. 1-4.
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