Reflection and absorption coefficients for use in room acoustic simulations

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Abstract

Two ideas to improve the boundary conditions for room acoustic simulations are presented. First, all rooms have finite boundary surfaces, thereby a reflection coefficient for finite surfaces should be
physically more suitable than that for infinitely large surfaces. Second, absorption coefficients measured by the chamber method, so-called the Sabine absorption coefficients, have certain problems to be used in geometrical acoustics simulations; one serious problem is that they often exceed unity for porous absorbers due to the finite sample size and non-uniform intensity in the test reverberation
chamber. Therefore the Sabine absorption coefficients should be converted into the random incidence absorption coefficients, which never exceed unity, thus are more proper for room acoustic simulations.
Original languageEnglish
Title of host publicationProceedings of Spring Meeting of the Acoustical Society of Korea.
Publication date2013
Pages104-107
Publication statusPublished - 2013
EventSpring meeting of the acoustical society of Korea - Incheon, Korea, Republic of
Duration: 9 May 201310 May 2013

Conference

ConferenceSpring meeting of the acoustical society of Korea
CountryKorea, Republic of
CityIncheon
Period09/05/201310/05/2013

Bibliographical note

Spring meeting of the Acoustical Society of Korea

Cite this

Jeong, C-H. (2013). Reflection and absorption coefficients for use in room acoustic simulations. In Proceedings of Spring Meeting of the Acoustical Society of Korea. (pp. 104-107)