Noise exposure group surveys - Number of days to sample

Authors

  • Alberto Behar IBBME, University of Toronto, 4 Taddle Creeg Rd., Toronto, Ont. M5S 3G9, Canada

Keywords:

Acoustic noise, Personnel, Probability density function, Sampling, Students, Testing, Group surveys, Noise exposure, Sample sizes, Workers

Abstract

A study to determine the number of noise exposure measurements days required to be performed on a group of workers, so as to obtain reliable results was conducted. In all 13 groups from two different sites were involved, with sample sizes ranging from 3 to 24 employees (average 12.5). Surveys were performed for four consecutive days. The reports from the surveys included the results from each one of the four days of testing (LTTrade,8) and of the corresponding LTrade,32. The daily LTrade,8 were compared with the corresponding LTrade,32, using the Student's t-Test. Results show that for the samples being tested, there were no significant differences in 88.5% of the cases. It was concluded that one day of testing is probably sufficient. However, because of the difficulty in determining a "typical" day, it is recommended that testing be performed for two days.

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Published

2005-06-01

How to Cite

1.
Behar A. Noise exposure group surveys - Number of days to sample. Canadian Acoustics [Internet]. 2005 Jun. 1 [cited 2021 Oct. 28];33(2):41-4. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1720

Issue

Section

Technical Articles