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Prediction of airborne and structure borne sound transmission through hearing protectors using FEM

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Sgard, Franck and Brummund, Martin and Viallet, Guilhem and Boyer, Sylvain and Doutres, Olivier and Nelisse, Hugues and Laville, Frédéric and Petit, Yvan and Boutin, Jérôme. 2014. « Prediction of airborne and structure borne sound transmission through hearing protectors using FEM ». In INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control (Melbourne, Australia, Nov. 16-19, 2014) Australian Acoustical Society.
Compte des citations dans Scopus : 2.

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Abstract

Individual hearing protection is a short term solution frequently used to protect workers against noise exposure. This work is part of a larger research program on the evaluation of real world attenuation of hearing protection devices (HPD) such as earplugs and earmuffs. Its objective is to develop a Finite Element (FE) model to predict both the airborne and structure borne sound transmission through an ear canal/hearing protector system. The model can help providing a better understanding of the acoustical behavior of this system and hence help designing better HPD ultimately. FEM can account for realistic ear and hearing protector geometries, materials with complicated physical behavioral laws and complex transmission phenomena through the different coupled domains in particular the tissues surrounding the ear canal. Several comparisons between numerical predictions and experimental results are presented. The sound transmission through the system is investigated using power balances and sensitivity analyses are carried out to identify the key parameters which govern the acoustic behavior of the system. The importance of parameters such as the system geometry, the coupling between the different domains and the loadings is discussed together with the characterization of the physical properties of each domain.

Item Type: Conference proceeding
Additional Information: Identifiant de l'article: Code 110401
Professor:
Professor
Laville, Frédéric
Doutres, Olivier
Petit, Yvan
Affiliation: Génie mécanique
Date Deposited: 09 Apr 2015 15:05
Last Modified: 07 Nov 2017 18:42
URI: http://espace2.etsmtl.ca/id/eprint/9472

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