Algebraic reflections in geometric acoustics
(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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- author
- Molin, Erik LU ; Bard, Delphine LU and Negreira, Juan LU
- organization
- publishing date
- 2017-06-25
- 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}}, }