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Measuring sound absorption coefficient under a synthesized diffuse acoustic field

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Robin, Olivier and Berry, Alain and Doutres, Olivier and Atalla, Noureddine. 2014. « Measuring sound absorption coefficient under a synthesized diffuse acoustic field ». In NoiseCon' 14: Advancing the Technology and Practice of Noise Control Engineering (Fort Lauderdale, FL, USA, Sept. 8-10, 2014), pp. 848-855. Springfield, IL, USA : Institute of Noise Control Engineering of the United States of America.

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Abstract

This paper proposes an experimental method to estimate the absorption coefficient of absorbing materials using a synthesized diffuse acoustic field in free-field conditions. Comparisons made with the standard reverberant room method and numerical simulations, using the transfer matrix method, show that the proposed approach do not exhibit non-physical trends of the reverberant room method and provide absorption coefficients in good agreement with those obtained by simulations for a laterally infinite material. Smaller samples than those required by standards can be used, together with a simplified implementation of absorption measurements under a precise and repeatable diffuse acoustic field.

Item Type: Conference proceeding
Professor:
Professor
Doutres, Olivier
Affiliation: Génie mécanique
Date Deposited: 09 Apr 2015 15:07
Last Modified: 23 Nov 2017 19:40
URI: http://espace2.etsmtl.ca/id/eprint/9471

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