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Algebraic reflections in geometric acoustics

Molin, Erik LU ; Bard, Delphine LU and Negreira, Juan LU (2017) 173rd Meeting of Acoustical Society of America, Acoustics 2017 and 8th Forum Acusticum In Proceedings of Meetings on Acoustics 30.
Abstract

Stochastic Ray tracing is one of the most widely used geometric acoustic algorithms, and excels primarily for modelling the late room response in high frequencies. A significant bottleneck of the algorithm is the high computational cost of testing rays for intersection with geometry, and the high amount of rays required for convergence. Several methods exist to reduce this cost by means of reducing geometric complexity. This paper instead proposes using bidirectional reflectance distribution functions (BRDF) to algebraically compute transmission paths between receivers and sources, thereby decreasing the amount of total rays needed. For each ray-geometry intersection, transmissions paths are calculated recursively, and several... (More)

Stochastic Ray tracing is one of the most widely used geometric acoustic algorithms, and excels primarily for modelling the late room response in high frequencies. A significant bottleneck of the algorithm is the high computational cost of testing rays for intersection with geometry, and the high amount of rays required for convergence. Several methods exist to reduce this cost by means of reducing geometric complexity. This paper instead proposes using bidirectional reflectance distribution functions (BRDF) to algebraically compute transmission paths between receivers and sources, thereby decreasing the amount of total rays needed. For each ray-geometry intersection, transmissions paths are calculated recursively, and several transmission paths can thereby be taken into account for each intersection test, while allowing for point-like transmitters and receivers. The method has been implemented on a graphics processor, and calculated room acoustic parameters are comparable to commercial geometric acoustic software, as well as measurements in the high frequency limit.

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Please use this url to cite or link to this publication:
author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Proceedings of Meetings on Acoustics
series title
Proceedings of Meetings on Acoustics
volume
30
article number
022002
edition
1
conference name
173rd Meeting of Acoustical Society of America, Acoustics 2017 and 8th Forum Acusticum
conference location
Boston, United States
conference dates
2017-06-25 - 2017-06-29
external identifiers
  • scopus:85049437065
ISSN
1939-800X
DOI
10.1121/2.0000621
language
English
LU publication?
yes
id
1e5c4e51-2b7c-47e4-b5f7-f2a78dd800ea
date added to LUP
2018-07-27 14:03:39
date last changed
2022-02-15 03:45:50
@inproceedings{1e5c4e51-2b7c-47e4-b5f7-f2a78dd800ea,
  abstract     = {{<p>Stochastic Ray tracing is one of the most widely used geometric acoustic algorithms, and excels primarily for modelling the late room response in high frequencies. A significant bottleneck of the algorithm is the high computational cost of testing rays for intersection with geometry, and the high amount of rays required for convergence. Several methods exist to reduce this cost by means of reducing geometric complexity. This paper instead proposes using bidirectional reflectance distribution functions (BRDF) to algebraically compute transmission paths between receivers and sources, thereby decreasing the amount of total rays needed. For each ray-geometry intersection, transmissions paths are calculated recursively, and several transmission paths can thereby be taken into account for each intersection test, while allowing for point-like transmitters and receivers. The method has been implemented on a graphics processor, and calculated room acoustic parameters are comparable to commercial geometric acoustic software, as well as measurements in the high frequency limit.</p>}},
  author       = {{Molin, Erik and Bard, Delphine and Negreira, Juan}},
  booktitle    = {{Proceedings of Meetings on Acoustics}},
  issn         = {{1939-800X}},
  language     = {{eng}},
  month        = {{06}},
  series       = {{Proceedings of Meetings on Acoustics}},
  title        = {{Algebraic reflections in geometric acoustics}},
  url          = {{http://dx.doi.org/10.1121/2.0000621}},
  doi          = {{10.1121/2.0000621}},
  volume       = {{30}},
  year         = {{2017}},
}