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

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

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 proceeding › Conference contribution › Professional

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 language	English
Title of host publication	Proceedings of the 60th International Conference of the Audio Engineering Society
Subtitle of host publication	DREAMS (Dereverberation and Reverberation of Audio, Music, and Speech)
Publisher	AES
Number of pages	8
Publication status	Published - 2016
MoE publication type	D3 Professional conference proceedings
Event	Audio Engineering Society Convention - Leuven, Belgium Duration: 3 Feb 2016 → 5 Feb 2016 Conference number: 60

Conference

Conference	Audio Engineering Society Convention
Country	Belgium
City	Leuven
Period	03/02/2016 → 05/02/2016

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http://www.aes.org/e-lib/browse.cfm?elib=18068

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Chobeau, P., Prepelita, S., Saarelma, J., Botts, J., & Savioja, L. (2016). Finite Volume Time Domain Simulations of Frequency-Dependent Boundary Conditions and Absorbing Layer. In Proceedings of the 60th International Conference of the Audio Engineering Society : DREAMS (Dereverberation and Reverberation of Audio, Music, and Speech) [2-1] AES. http://www.aes.org/e-lib/browse.cfm?elib=18068

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title = "Finite Volume Time Domain Simulations of Frequency-Dependent Boundary Conditions and Absorbing Layer",

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.",

author = "Pierre Chobeau and Sebastian Prepelita and Jukka Saarelma and Jonathan Botts and Lauri Savioja",

year = "2016",

language = "English",

booktitle = "Proceedings of the 60th International Conference of the Audio Engineering Society",

publisher = "AES",

note = "Audio Engineering Society Convention ; Conference date: 03-02-2016 Through 05-02-2016",

}

Chobeau, P, Prepelita, S, Saarelma, J, Botts, J & Savioja, L 2016, Finite Volume Time Domain Simulations of Frequency-Dependent Boundary Conditions and Absorbing Layer. in Proceedings of the 60th International Conference of the Audio Engineering Society : DREAMS (Dereverberation and Reverberation of Audio, Music, and Speech)., 2-1, AES, Audio Engineering Society Convention, Leuven, Belgium, 03/02/2016. <http://www.aes.org/e-lib/browse.cfm?elib=18068>

Finite Volume Time Domain Simulations of Frequency-Dependent Boundary Conditions and Absorbing Layer. / Chobeau, Pierre; Prepelita, Sebastian; Saarelma, Jukka; Botts, Jonathan; Savioja, Lauri.

Proceedings of the 60th International Conference of the Audio Engineering Society : DREAMS (Dereverberation and Reverberation of Audio, Music, and Speech). AES, 2016. 2-1.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Professional

TY - GEN

T1 - Finite Volume Time Domain Simulations of Frequency-Dependent Boundary Conditions and Absorbing Layer

AU - Chobeau, Pierre

AU - Prepelita, Sebastian

AU - Saarelma, Jukka

AU - Botts, Jonathan

AU - Savioja, Lauri

N1 - Conference code: 60

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

M3 - Conference contribution

BT - Proceedings of the 60th International Conference of the Audio Engineering Society

PB - AES

T2 - Audio Engineering Society Convention

Y2 - 3 February 2016 through 5 February 2016

ER -