Finite volume time domain room acoustics simulation under general impedance boundary conditions

Stefan Bilbao*, Brian Hamilton, Jonathan Botts, Lauri Savioja

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

20 Sitaatiot (Scopus)

Abstrakti

In room acoustics simulation and virtualization applications, accurate wall termination is a perceptually crucial feature. It is particularly important in the setting of wave-based modeling of 3D spaces, using methods such as the finite difference time domain method or finite volume time domain method. In this paper, general locally reactive impedance boundary conditions are incorporated into a 3D finite volume time domain formulation, which may be specialized to the various types of finite difference time domain method under fitted boundary termination. Energy methods are used to determine stability conditions for general room geometries, under a large family of nontrivial wall impedances, for finite volume methods over unstructured grids. Simulation results are presented, highlighting in particular the need for unstructured or fitted cells at the room boundary in the case of the accurate simulation of frequency-dependent room mode decay times.

AlkuperäiskieliEnglanti
Artikkeli7327143
Sivut161-173
Sivumäärä13
JulkaisuIEEE/ACM Transactions on Audio, Speech, and Language Processing
Vuosikerta24
Numero1
DOI - pysyväislinkit
TilaJulkaistu - tammikuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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