Finite Volume Time Domain Simulations of Frequency-Dependent Boundary Conditions and Absorbing Layer

Pierre Chobeau, Sebastian Prepelita, Jukka Saarelma, Jonathan Botts, Lauri Savioja

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

Abstract

Accurate calculation of both early reflections and the reverberant field of an enclosed space requires accurate boundary modeling in terms of both spatial geometry and absorbing conditions. Within the framework of time-domain room acoustics simulations, the finite volume (FV) method allows to derive a scheme over unstructured grids, which is a feature of interest for the approximation of irregular boundaries. The frequency-dependence of FV boundaries has not been explored in detail yet beyond energy conservation. The present communication investigates both frequency-independent and frequency-dependent boundary conditions for the FV method comparing reflection coefficient magnitudes. The numerical results obtained for reflection coefficients are in agreement with the theory for a large span of angles and frequencies. In addition, an absorbing layer is proposed and compared to a matched absorbing boundary condition.
Original languageEnglish
Title of host publicationProceedings of the 60th International Conference of the Audio Engineering Society
Subtitle of host publicationDREAMS (Dereverberation and Reverberation of Audio, Music, and Speech)
PublisherAES
Number of pages8
Publication statusPublished - 2016
MoE publication typeD3 Professional conference proceedings
EventAudio Engineering Society Convention - Leuven, Belgium
Duration: 3 Feb 20165 Feb 2016
Conference number: 60

Conference

ConferenceAudio Engineering Society Convention
CountryBelgium
CityLeuven
Period03/02/201605/02/2016

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