Investigating the stability of frequency-dependent locally reacting surface boundary conditions in numerical acoustic models

Oxnard, Stephen (2018) Investigating the stability of frequency-dependent locally reacting surface boundary conditions in numerical acoustic models. Journal of the Acoustical Society of America, 143 (4). EL266-EL270. ISSN 1520-8524

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Official URL: https://doi.org/10.1121/1.5030917

Abstract

Numerical acoustic modeling enables simulation of sound propagation through bounded space. Recent research directed to refining Finite Difference Time Domain solutions for acoustic prediction has focused on emulating sound wave-surface interaction. Locally reacting surface properties are a popular choice for deriving boundary conditions that incorporate surface absorption properties. However, implementation of these boundary conditions, using the methods described in prevalent literature, is demonstrated here as unstable for complex room geometries. This work presents a reformulated implementation of frequency-dependent locally reacting surface boundary conditions for Finite Difference Time Domain simulations that is empirically demonstrated to be robust against simulation instabilities.

Item Type: Journal Article
Keywords: Numerical Acoustic Modelling, Room Acoustics, Finite Difference Methods
Faculty: Faculty of Science & Technology
Depositing User: Dr Stephen Oxnard
Date Deposited: 26 Apr 2018 08:07
Last Modified: 24 Apr 2019 11:09
URI: http://arro.anglia.ac.uk/id/eprint/702950

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