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The influence of different scattering algorithms on room acoustic simulations in rectangular rooms

Autio, Hanna LU orcid ; Vardaxis, Nikolaos Georgios LU and Hagberg, Delphine Bard LU (2021) In Buildings 11(9).
Abstract

Raytracing is a widespread tool for room acoustic simulations, and one of its main advan-tages is the inclusion of surface scattering. Although surface scattering has been acknowledged as a central aspect of accurate raytracing simulations for many years, there is ongoing research into its effects and how to implement it better. This study evaluates three different algorithms for surface scattering in raytracers, referred to as on–off scattering, perturbation scattering, and diffuse field scattering. Their theoretical foundation is discussed, and the physical accuracy of the resulting simulations is evaluated by comparing simulated room acoustic parameters to measurements. It is found that the choice of surface scattering algorithm has... (More)

Raytracing is a widespread tool for room acoustic simulations, and one of its main advan-tages is the inclusion of surface scattering. Although surface scattering has been acknowledged as a central aspect of accurate raytracing simulations for many years, there is ongoing research into its effects and how to implement it better. This study evaluates three different algorithms for surface scattering in raytracers, referred to as on–off scattering, perturbation scattering, and diffuse field scattering. Their theoretical foundation is discussed, and the physical accuracy of the resulting simulations is evaluated by comparing simulated room acoustic parameters to measurements. It is found that the choice of surface scattering algorithm has a significant impact on the simulation outcomes, both in terms of physical accuracy and in terms of usability. Additionally, there are differences in the parametrization of surface scattering depending on the algorithm chosen. Of the three tested algorithms, the most commonly used algorithm (on–off scattering) seems to have the best properties for simulations.

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Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Acoustic raytracing, Room acoustic simulation, Surface scattering
in
Buildings
volume
11
issue
9
article number
414
publisher
MDPI AG
external identifiers
  • scopus:85115779976
ISSN
2075-5309
DOI
10.3390/buildings11090414
language
English
LU publication?
yes
id
b9d6946b-634f-40c8-af18-e521ffe2db8c
date added to LUP
2021-10-08 14:00:30
date last changed
2024-02-04 04:38:11
@article{b9d6946b-634f-40c8-af18-e521ffe2db8c,
  abstract     = {{<p>Raytracing is a widespread tool for room acoustic simulations, and one of its main advan-tages is the inclusion of surface scattering. Although surface scattering has been acknowledged as a central aspect of accurate raytracing simulations for many years, there is ongoing research into its effects and how to implement it better. This study evaluates three different algorithms for surface scattering in raytracers, referred to as on–off scattering, perturbation scattering, and diffuse field scattering. Their theoretical foundation is discussed, and the physical accuracy of the resulting simulations is evaluated by comparing simulated room acoustic parameters to measurements. It is found that the choice of surface scattering algorithm has a significant impact on the simulation outcomes, both in terms of physical accuracy and in terms of usability. Additionally, there are differences in the parametrization of surface scattering depending on the algorithm chosen. Of the three tested algorithms, the most commonly used algorithm (on–off scattering) seems to have the best properties for simulations.</p>}},
  author       = {{Autio, Hanna and Vardaxis, Nikolaos Georgios and Hagberg, Delphine Bard}},
  issn         = {{2075-5309}},
  keywords     = {{Acoustic raytracing; Room acoustic simulation; Surface scattering}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{9}},
  publisher    = {{MDPI AG}},
  series       = {{Buildings}},
  title        = {{The influence of different scattering algorithms on room acoustic simulations in rectangular rooms}},
  url          = {{http://dx.doi.org/10.3390/buildings11090414}},
  doi          = {{10.3390/buildings11090414}},
  volume       = {{11}},
  year         = {{2021}},
}