Effects of compression on the sound absorption of fibrous

Bernard Castagnede, Achour Akninen, Achour Brouard, Viggo Tarnow

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    During the compression of a fibrous mat, it is well known that the absorption properties are decreasing. In order to predict this change, some heuristic formulae are proposed which take into account the modifications of the physical parameters(porosity, resistivity, tortousity and shappe factors) which enter in the standard "equivalent fluid" model. Numerical predictions are then discussed and compared to experimental data obtained on a fibrous material(uncompressed and the compressed) used in automotive industry.
    Original languageEnglish
    JournalApplied Acoustics
    Volume61
    Pages (from-to)173-182
    ISSN0003-682X
    Publication statusPublished - 2000

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