Scale-model evaluation of the performance of suspended baffle arrays in typical factory sound fields

Auteurs-es

  • M. Hodgson Dept. of Mech. Eng., British Columbia Univ., Vancouver, BC, Canada

Mots-clés :

acoustic noise, acoustic wave absorption, noise abatement, industrial buildings, baffles, sound-absorptive material, absorption coefficient, reverberation rooms, diffuse sound field, surface absorption, ray-tracing model

Résumé

Sound fields in industrial buildings are often controlled by the installation of arrays of baffles (rectangular pieces of sound-absorptive material) suspended from the building roof. Several researchers have measured the performance, in particular the absorption coefficient, of baffle arrays in reverberation rooms-that is, in a diffuse sound field. Unfortunately, the sound fields in most industrial buildings are non-diffuse for reasons related to the room shape, surface absorption and the presence of fittings (machines, stockpiles and other obstacles in the room). The performance of absorptive materials in a non-diffuse sound field may be very different from that in a diffuse sound field. In order to determine the performance of baffles in non-diffuse fields such as those found in typical factories, reverberation times and steady-state sound pressure levels were measured in a 1:8 scale model with variable dimensions, and containing various arrays of baffles. The experimental results were then predicted using a ray-tracing model, with the input parameters describing the baffle array varied in order to obtain a best fit. The results for the preliminary series of tests are described and summarized, with emphasis on the experimental work

Fichiers supplémentaires

Publié-e

1992-09-01

Comment citer

1.
Hodgson M. Scale-model evaluation of the performance of suspended baffle arrays in typical factory sound fields. Canadian Acoustics [Internet]. 1 sept. 1992 [cité 4 mai 2026];20(3):19-20. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/718

Numéro

Vol. 20 No. 3 (1992)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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