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 language | English |
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Title of host publication | Proceedings of Forum Acusticum 2014 |
Number of pages | 4 |
Publisher | European Acoustics Association |
Publication date | 2014 |
Publication status | Published - 2014 |
Event | 7th Forum Acusticum - Krakow, Poland Duration: 7 Sept 2014 → 12 Sept 2014 |
Conference
Conference | 7th Forum Acusticum |
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Country/Territory | Poland |
City | Krakow |
Period | 07/09/2014 → 12/09/2014 |