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 Sept 201412 Sept 2014

    Conference

    Conference7th Forum Acusticum
    Country/TerritoryPoland
    CityKrakow
    Period07/09/201412/09/2014

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