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Assessing sound absorption coefficient under a synthetized diffuse acoustic field: effect of the sample size and nature

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Robin, Olivier and Amedin, Celsa Kafui and Berry, Alain and Atalla, Noureddine and Doutres, Olivier and Sgard, Franck. 2015. « Assessing sound absorption coefficient under a synthetized diffuse acoustic field: effect of the sample size and nature ». In INTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise15 (San Francisco, CA, USA, Aug. 9-12, 2015), pp. 4173-4183. INCE-USA.

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Abstract

A method for estimating the sound absorption coefficient of a material under a synthesized Diffuse Acoustic Field was recently proposed, as an alternative to classical sound absorption measurements in reverberant rooms. Using sound field reproduction approaches and a synthetic array of acoustic monopoles facing the material, estimation of the sound absorption coefficient under a reproduced Diffuse Acoustic Field but in free-field conditions was shown to be feasible. The method was successfully tested on two samples of melamine foam of close thicknesses and areas. In this paper, the principle of the method will be first recalled. The effect of varying the reproduction array size on the calculated sound absorption coefficients is then studied. A comparative measurement between the suggested method and the reverberant room method on ceiling tiles is finally reported.

Item Type: Conference proceeding
Professor:
Professor
Doutres, Olivier
Affiliation: Génie mécanique
Date Deposited: 22 Sep 2015 15:50
Last Modified: 03 Aug 2017 14:54
URI: http://espace2.etsmtl.ca/id/eprint/11324

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