Laboratory and in situ sound absorption measurement under a synthetized diffuse acoustic field
Type de document
Études primaires
Année de publication
2019
Langue
Anglais
Titre de la revue
Building Acoustics
Première page
223
Dernière page
242
Résumé
This article reports numerical and experimental results concerning the estimation of the diffuse field sound absorption coefficient of several different materials under a synthetized diffuse acoustic field excitation in laboratory and in situ conditions. The proposed measurement method is based on a sound field reproduction approach and a synthetic array of acoustic monopoles facing the material to be tested. Numerical simulations are first conducted to optimize the geometrical parameters of the method and to compute theoretical sound absorption coefficients of the considered materials. Measurements on a set of six typical acoustic materials are then conducted following the standardized reverberant room method as well as the proposed approach in a hemi-anechoic room and in two realistic rooms. Albeit showing limitations in the low-frequency domain, the proposed method enables a significant reduction of the tested specimen dimensions compared with the reverberant room method and allows performing tests in non-ideal acoustic environments.
Mots-clés
Absorption acoustique, Sound absorption, Évaluation du matériel, Evaluation of equipment, Méthodologie, Methodology, Propagation du son, Sound propagation, Garniture d'insonorisation, Sound absorbing fitting, Détermination expérimentale, Experimental determination
Numéro de projet IRSST
2014-0006
Citation recommandée
Robin, O., Berry, A., Amédin, C. K., Atalla, N., Doutres, O. et Sgard, F. (2019). Laboratory and in situ sound absorption measurement under a synthetized diffuse acoustic field. Building Acoustics, 26(4), 223-242. https://doi.org/10.1177/1351010X19870307