Sabine absorption coefficients to random incidence absorption coefficients

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Abstract

Absorption coefficients measured by the chamber method are referred to as Sabine absorption coefficients, which sometimes exceed unity due to the finite size of a specimen and non-uniform intensity in the test chamber. In this study, several methods that convert Sabine absorption coefficients into random incidence absorption coefficients for porous absorbers are investigated. Two optimization-based conversion methods are suggested: the surface impedance estimation for locally reacting absorbers and the flow resistivity estimation for extendedly reacting absorbers. The suggested conversion methods are validated with measured data.
Original languageEnglish
Title of host publicationProceedings of Forum Acusticum 2014
Number of pages4
PublisherEuropean Acoustics Association
Publication date2014
Publication statusPublished - 2014
Event7th Forum Acusticum - Krakow, Poland
Duration: 7 Sep 201412 Sep 2014

Conference

Conference7th Forum Acusticum
CountryPoland
CityKrakow
Period07/09/201412/09/2014

Cite this

Jeong, C-H. (2014). Sabine absorption coefficients to random incidence absorption coefficients. In Proceedings of Forum Acusticum 2014 European Acoustics Association.