Shock and Vibration

Shock and Vibration / 2002 / Article
Special Issue

COBEM 2001

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Open Access

Volume 9 |Article ID 369806 | 7 pages | https://doi.org/10.1155/2002/369806

Numerical and Experimental Study of Impulsive Sound Attenuation of an Earmuff

Received15 Nov 2002
Revised15 Nov 2002

Abstract

This work compares the results of laboratory experiments with numerical modelling using the finite element method in order to assess the attenuation of hearing protectors under conditions of high amplitude impulse noise. Comparative data for the finite element simulation was provided from a series of experiments using a shock tube, acoustic test fixture, ear canal simulator and partial head form. The numerical model comprised a finite element mesh of fluid and porous materials in order to model the earmuff hearing protector coupled to the auditory canal. The results show that a simple 2-D finite element model is capable of making a reasonable prediction of the attenuation of an earmuff provided that headband force is also included in the model.

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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