FRANÇAIS
A showcase of ÉTS researchers’ publications and other contributions
SEARCH

Modelling of the acoustic radiation of a structure covered by a porous layer

Downloads

Downloads per month over past year

Doutres, Olivier and Dauchez, Nicolas. 2005. « Modelling of the acoustic radiation of a structure covered by a porous layer ». In Noise and Vibration : Emerging Methods (NOVEM) (St-Raphael, France, Apr., 2005)

[img]
Preview
PDF
Doutres O 2005 8809 Modelling of the acoustic radiation.pdf - Accepted Version
Use licence: All rights reserved to copyright holder.

Download (681kB) | Preview

Abstract

To predict noise in enclosure containing treated vibrating panels, porous layer effect has to be taken into account. This study propose an analytical model of the effects of a porous layer on a vibrating plate by separating the acoustical and vibratory behaviours. This paper deals with acoustic coupling by means of surface impedance derived by a one-dimensional model using ”Biot-Allard” theory. It is shown that this impedance is different from that calculated when the porous is backed by an impervious rigid wall. The total radiation efficiency of a circular plate characterized by the surface impedance, clamped in a rigid infinite baffle, is computed and compared with experimental measurements. This model shows good agreement with experimental datas.

Item Type: Conference proceeding
Professor:
Professor
Doutres, Olivier
Affiliation: Autres
Date Deposited: 29 Oct 2014 17:52
Last Modified: 07 Nov 2017 18:48
URI: http://espace2.etsmtl.ca/id/eprint/8809

Actions (login required)

View Item View Item