Experimental validation of a ray-tracing model for factory noise prediction

Authors

  • M. Hodgson Dept. de Genie Mecanique Sherbrooke Univ., Que., Canada
  • R. Woodcock Dept. de Genie Mecanique Sherbrooke Univ., Que., Canada

Keywords:

acoustic noise, acoustic wave propagation, ray-tracing model, factory noise prediction, noise-exposure levels, sound pressure levels, machine shop

Abstract

Factory-noise prediction models are invaluable in allowing worker noise-exposure levels in a factory to be evaluated prior to construction and, if necessary, for modifications to be made or noise-control measures to be evaluated. Ray-tracing techniques have proven to have the necessary accuracy and flexibility. In order to evaluate the accuracy of a ray-tracing model, comparisons were made between predicted and measured sound pressure levels for a machine shop with nine noise sources in operation. The shop was modelled using the known geometry, source and receiver positions, air absorption coefficients and the measured source sound power levels. Surface absorption coefficients were chosen on the basis of reverberation time measurements in similar factories when empty. The machine shop fitting density and absorption coefficients were chosen on the basis of previous research and by comparing the predicted and measured sound propagation curves for the shop, varying the fitting density to obtain a best-fit agreement. The ray-tracing model proved to give an excellent prediction accuracy

Published

1988-10-01

How to Cite

1.
Hodgson M, Woodcock R. Experimental validation of a ray-tracing model for factory noise prediction. Canadian Acoustics [Internet]. 1988Oct.1 [cited 2021Apr.12];16(4):9-19. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/596

Issue

Section

Technical Articles