Finite Difference Time Domain Modeling of Phase Grating Diffusion

Conference contribution


Publication Details

Author(s): Kowalczyk K, van Walstijn M
Publication year: 2010
Conference Proceedings Title: Proceedings of the 4th International Symposium on Communications, Control and Signal Processing, ISCCSP 2010
Pages range: 1-4
ISBN: 978-1-4244-6287-2
Language: English


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.


FAU Authors / FAU Editors

Kowalczyk, Konrad Dr.
Professur für Nachrichtentechnik


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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Last updated on 2019-30-04 at 17:10

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