S-2.1, r. 11 - Regulation respecting the quality of the work environment

Schedule Disposition versions

2012-09-01

SCHEDULE F

(s. 47)

METHOD OF MEASURING PREDOMINANT FREQUENCY BANDS (in corrected dBA)

(a) Using the analysis of each octave band from 31.5 Hz to 16 kHz, determine if one of the bands corresponds to the notion of predominant frequency band;

(b) add 5 dB to the measured level of each band corresponding to the notion of predominant frequency band;

(c) modify the resulting sound spectrum as follows:

— at the level of 31.5 Hz, deduct 39.4 dB

— at the level of 63 Hz, deduct 26.2 dB

— at the level of 125 Hz, deduct 16.1 dB

— at the level of 250 Hz, deduct 8.6 dB

— at the level of 500 Hz, deduct 3.2 dB

— at the level of 1,000 Hz, no modification

— at the level of 2,000 Hz, add 1.2 dB

— at the level of 4,000 Hz, add 1.0 dB

— at the level of 8,000 Hz, deduct 1.1 dB

— at the level of 16,000 Hz, deduct 6.6 dB;

(d) then add the levels of each octave of the spectrum thus modified by following the method for adding decibels;

(e) the result thus obtained is expressed in corrected dBA.

R.R.Q., 1981, c. S-2.1, r. 15, Sch. F.