SCHEDULE IV

(s. 6.7)

	Column I	Column II
Item	Task position or area	Level in lx
1.	VDT WORK
	(a) Task positions at which data entry and retrieval work are performed intermittently	500
	(b) Task positions at which data entry work is performed exclusively	750
	(c) [Repealed, SOR/2008-276, s. 1]
	(d) Telephone operator areas	300

• SOR/89-515, s. 1;
• SOR/2008-276, s. 1.

Previous Version

7.1 In this Part,

“A-weighted sound pressure level”

“A-weighted sound pressure level” means a sound pressure level as determined by a measurement system which includes an A-weighting filter that meets the requirements set out in the International Electrotechnical Commission Standard 651 (1979), Sound Level Meters, as amended from time to time; (niveau de pression acoustique pondérée A)

“dBA”

“dBA” means decibel A-weighted and is a unit of A-weighted sound pressure level; (dBA)

“large truck”

“large truck”[Repealed, SOR/98-589, s. 1]

“noise exposure level (L_ex,8)”

“noise exposure level (L_ex,8)” means 10 times the logarithm to the base 10 of the time integral over any 24 hour period of a squared A-weighted sound pressure divided by 8, the reference sound pressure being 20 µPa; (niveau d’exposition (L_ex,8))

“sound level meter”

“sound level meter” means a device for measuring sound pressure level that meets the performance requirements for a Type 2 instrument as specified in the International Electrotechnical Commission Standard 651 (1979), Sound Level Meters, as amended from time to time; (sonomètre)

“sound pressure level”

“sound pressure level” means 20 times the logarithm to the base 10 of the ratio of the root mean square pressure of a sound to the reference sound pressure of 20 µPa, expressed in decibels. (niveau de pression acoustique)