AGRICULTURAL SAFETY TOPICS – PROTECTInG AGAInST nOISE
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360-004-02-IGDO © 2016, Workplace Safety & Prevention Services (WSPS)
1 877 494 WSPS (9777) | 905 614 1400 | www.wsps.ca
Protective covering or insertions in the ears reduces noise levels to the inner ear. It is important to
properly select and use hearing protection when noise exposure cannot be controlled adequately by
environmental changes, such as working farther away from the noise. Hearing protection should be worn
when noise levels exceed 85 decibels.
Good protection against noise depends on the rating of the hearing protection used, seal between the
surface of the skin and the surface of the hearing protector. Caution should be taken because protectors
can become loose and create leaks. Having a leak reduces the protection from harmful noise levels.
Talking and even chewing can create a leak in the hearing protection. Earplugs should be made of a soft
material, and be properly designed, well-fitted, and clean.
Not all materials can block the same amount of sound. The manufacturer indicates how much noise
(in decibels) the hearing protection device blocks. This is called the noise reduction rating (NRR).
For general use, look for a NRR of 25 or greater. In extremely noisy conditions, above 105 decibels, a
combination of both ear plugs and earmuffs may be required to adequately protect the worker.
Review The Following Points:
Sound that exceeds 85 decibels can cause hearing loss.
Good protection against noise depends on the seal between the surface of the skin and the surface
of the ear protector.
It is important that hearing protection is worn properly.
If head noise or ringing noises occur in the ears at the end of the workday, the worker might be
exposed to too much noise, and should take precautionary measures.
How can WSPS help?
Noise level surveys
Qualitative assessments
Area and personal noise exposure assessments
Assistance with meeting legislative requirements
Workplace program audits and training
wsps.ca
