Page 463 - PortWest

P P PS43S43S43
PROTECTION
PROTECTION
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WORK ORK ORK O
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HEARING
HEARING
CONFIDENTLY AND ONFIDENTLY AND ND Y AND NTLY ANFIONFIDEN
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COMFORTABLY OMFORTABLY OOMFOR
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W UR H EARE ING I
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WITH OUR HEARING ITH OUR HEARING IITH OUR H
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PROTECTION ROTECTIONOTE TION ROTECTIO
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RANGE, DESIGNED ANGE, DESIGNED ANGE, D SIGNEANGE, DESIG ED
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MATERIALS AND ATERIALS AND LS ANATERIALSATER AND
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TECHNOLOGIES TO ECHNOLOGIES TO GIES TECHNOLOGIECHNOL S TO
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SAFEGUARD YOUR AFEGUARD YOUR YOURRD YOAFEGUARFEG
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HEARING. EARING. EARING.
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USA STANDARDS EUROPEAN STANDARDS
ANSI (US American National Standards Institute) EN 352-1 : 2020 Hearing Protectors - Ear Muffs
S3.19 - 1974 EN 352-2 : 2020 Hearing Protectors - Ear Plugs
This standard specifies the test method for determining the level of noise attenuation EN 352-3 : 2020 Hearing Protectors - Hard Hat Mounted Ear Muffs
(NRR Noise Reduction Rating) of the hearing protection, as recommended by the EPA EN 352-4 : 2020 Hearing Protectors - Level Dependent Ear Muffs
(U.S. Environmental Protection Agency) and in accordance with the Occupational
Safety and Health Administration (OSHA) . EN 352-8 : 2020 Earmuffs with Entertainment Radio
All these standards establish requirements with regards to the manufacture, design,
Noise Reduction Rating (NRR) performances and test methods.
This is a unit of measurement used to determine the effectiveness of hearing protection
devices to decrease sound exposure within a given working environment, classified by
their potential to reduce noise in decibels (dB).
Excessive noise is generally defined as exposure to 85 or more decibels of sound ULTIMATE
over an 8 hour period. According to OSHA, hearing protection is required for all
employees at this degree of exposure. In all cases where the sound levels exceed the PROTECTION
values shown below, a continuing, effective hearing conservation program should be
implemented. Example: if a worker is exposed to 100dB in a 2 hour period, he is also
required to wear hearing protection. AGAINST HARMFUL
NOISES

OSHA’S Permissible Noise Exposures
Duration per day, hours Sound level dBA slow response
8 90
6 92
4 95
2 100
1 105
0.5 110
<0.25 115
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