Comparing a phased combination of acoustical radiosity and the image source method with other simulation tools

Gerd Høy Marbjerg, Jonas Brunskog, Cheol-Ho Jeong, Erling Nilsson

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A phased combination of acoustical radiosity and the image source method (PARISM) has been developed in order to be able to model both specular and diffuse reflections with angle-dependent and complex-valued acoustical descriptions of the surfaces. It is of great interest to model both specular and diffuse reflections when simulating the acoustics of small rooms with non-diffuse sound fields, since scattering from walls add to the diffuseness in the room. This room type is often seen in class rooms and offices, as they are often small rectangular rooms with most of the absorption placed on the ceiling. Here, PARISM is used for comparisons with other simulation tools and measurements. An empty, rectangular room with a suspended absorbing ceiling is used for the comparisons. It was found that including the phase information in simulations increases the spatial standard deviation, even if only the propagation phase is considered. It was furthermore found that it is difficult to match simulations with measurements, when the input data are unknown and therefore estimated.
Original languageEnglish
Title of host publicationProceedings of Euronoise 2015
Number of pages6
Publication date2015
Publication statusPublished - 2015
EventEuroNoise 2015: 10th European Congress and Exposition on Noise Control Engineering - Maastrict, Netherlands
Duration: 31 May 20153 Jun 2015

Conference

ConferenceEuroNoise 2015
CountryNetherlands
CityMaastrict
Period31/05/201503/06/2015

Cite this

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title = "Comparing a phased combination of acoustical radiosity and the image source method with other simulation tools",
abstract = "A phased combination of acoustical radiosity and the image source method (PARISM) has been developed in order to be able to model both specular and diffuse reflections with angle-dependent and complex-valued acoustical descriptions of the surfaces. It is of great interest to model both specular and diffuse reflections when simulating the acoustics of small rooms with non-diffuse sound fields, since scattering from walls add to the diffuseness in the room. This room type is often seen in class rooms and offices, as they are often small rectangular rooms with most of the absorption placed on the ceiling. Here, PARISM is used for comparisons with other simulation tools and measurements. An empty, rectangular room with a suspended absorbing ceiling is used for the comparisons. It was found that including the phase information in simulations increases the spatial standard deviation, even if only the propagation phase is considered. It was furthermore found that it is difficult to match simulations with measurements, when the input data are unknown and therefore estimated.",
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Marbjerg, GH, Brunskog, J, Jeong, C-H & Nilsson, E 2015, Comparing a phased combination of acoustical radiosity and the image source method with other simulation tools. in Proceedings of Euronoise 2015. EuroNoise 2015, Maastrict, Netherlands, 31/05/2015.

Comparing a phased combination of acoustical radiosity and the image source method with other simulation tools. / Marbjerg, Gerd Høy; Brunskog, Jonas; Jeong, Cheol-Ho; Nilsson, Erling .

Proceedings of Euronoise 2015. 2015.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - Comparing a phased combination of acoustical radiosity and the image source method with other simulation tools

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AU - Nilsson, Erling

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AB - A phased combination of acoustical radiosity and the image source method (PARISM) has been developed in order to be able to model both specular and diffuse reflections with angle-dependent and complex-valued acoustical descriptions of the surfaces. It is of great interest to model both specular and diffuse reflections when simulating the acoustics of small rooms with non-diffuse sound fields, since scattering from walls add to the diffuseness in the room. This room type is often seen in class rooms and offices, as they are often small rectangular rooms with most of the absorption placed on the ceiling. Here, PARISM is used for comparisons with other simulation tools and measurements. An empty, rectangular room with a suspended absorbing ceiling is used for the comparisons. It was found that including the phase information in simulations increases the spatial standard deviation, even if only the propagation phase is considered. It was furthermore found that it is difficult to match simulations with measurements, when the input data are unknown and therefore estimated.

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