Acoustic response of a rigid frame porous medium slab with a periodic set of inclusions

Abstract : The acoustic response of a rigid frame porous slab with a periodic set of inclusions is calculated by use of a multipole method. The acoustic properties, in particular the absorption, of such a structure are then derived and studied. Numerical results together with a modal analysis show that the addition of a periodic set of high-contrast inclusions leads to quasi-modes excitation of both the slab and the gratings, and to a large increase of the acoustic absorption of the initial slab, this being partly due to the quasi-modes excitation.
Type de document :
Pré-publication, Document de travail
OR 22. submitted to Journal of Sound and Vibration. 2007
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Soumis le : vendredi 18 mai 2007 - 16:21:48
Dernière modification le : jeudi 10 mai 2018 - 02:04:25
Document(s) archivé(s) le : jeudi 8 avril 2010 - 17:03:42

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  • HAL Id : hal-00147584, version 1
  • ARXIV : 0705.2754

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Jean-Philippe Groby, Armand Wirgin, Laurent De Ryck, Walter Lauriks. Acoustic response of a rigid frame porous medium slab with a periodic set of inclusions. OR 22. submitted to Journal of Sound and Vibration. 2007. 〈hal-00147584〉

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