Measuring sound absorption coefficient under a synthesized diffuse acoustic field

Robin, Olivier, Berry, Alain, 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:	https://espace2.etsmtl.ca/id/eprint/9471

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