Improved Finite Difference Schemes for a 3-D Viscothermal Wave Equation on a GPU

Brian Hamilton, Stefan Bilbao, Craig Webb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Viscothermal effects in air lead to a damping of high-frequencies over space. Such effects cannot be neglected in large-scale room acoustics simulations for the full audible bandwidth. In this study, full-bandwidth room acoustics is modelled using a variant of the three-dimensional wave equation including viscothermal losses in air following from a simplification of the Navier-Stokes equations suitable for room acoustics applications. The model equation is numerically solved using time-domain finite difference methods. A three-step parameterised finite difference scheme is proposed to model T60 decay times as a function of frequency more accurately than two-step schemes. Timing results
from parallelised implementations on a graphics processing unit (GPU) card are presented.
Original languageEnglish
Title of host publicationProceedings of Forum Acusticum
Number of pages9
Publication statusPublished - 7 Sep 2014
Event7th Forum Acusticum 2014 Krakow - Krakow, Poland
Duration: 7 Sep 201412 Sep 2014

Conference

Conference7th Forum Acusticum 2014 Krakow
Country/TerritoryPoland
CityKrakow
Period7/09/1412/09/14

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