Hearing Protection

UNB Reference Number: 7806
Authorized by: J.M. Anderson, President,
Effective Date: December 1, 1978
Revised: September 2001
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To outline the hazards and regulations relating to noise level.


All persons who may be exposed to hazardous sound levels while working.


  • Where a person has reason to suspect that noise levels may exceed 80 decibels (dBA), the amount of time spent in the area and the level of noise shall be documented and measured by a competent person using instrumentation which conforms to the current ANSI standard.
  • All practical steps shall be taken to ensure noise levels do not esceed the following exposures:
Sound Level Decibels (dBA)Duration in Hours/24 hour Day
80 24
82 16
85 8
88 4
91 2
94 1
97 1/2
100 1/4
  • Where a person is exposed to a sound level in excess of 100 dBA, adequate hearing protection shall be worn.
  • No person shall be exposed to continuous, intermittent or impact noise in excess of 140 dBA.


  • Noise levels will be measured by the Physical Plant Department at the request of a department who suspects they have potentially hazardous areas.
  • Where noise levels exceed 85 dBA, the area shall be marked by a sign which indicates the range of noise levels, and warns of the noise hazard. The signs shall also indicate that hearing protection shall be worn when daily exposure is more than permitted for the particular sound level.
  • Where hearing protection is required, the Department shall provide the appropriate type of protection and the worker shall wear the equipment.

Refer further to the N.B. Occupational Health & Safety Act & Regulations