Industrial Hearing Protection -

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Hearing Protection
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Hearing Protection
Every year, approximately 30 million people in the United States are exposed to hazardous noise on the job. Noise-induced hearing loss is 100% preventable through the successful application of engineering controls and hearing conservation programs. OSHA hearing conservation programs require employers to do the following:
• Conduct noise surveys
• Run audiometric testing
• Offer baseline and annual hearing screening
• Provide hearing protection*
• Give training
• Keep records
*Hearing protection must be made available to the employee when they are exposed to constant noise of 80 dB or peak noise of 135 dB.

Excerpt from the Code of Regulations (CFR)
Occupational Noise Exposure: 29 CFR 1910.95
Protection against the effects of noise exposure shall be provided when the sound levels exceed those shown in table A when measured on the A scale of standard sound level meter at slow response. When employees are subjected sound exceeding those listed in the table A, feasible administrative or engineering controls shall be utilized. If such controls fail to reduce sound levels within the levels of table A, personal protective equipment shall be provided and used to reduce sound levels within the levels of the table. If the variations in noise level involve maxima at intervals of one second or less, it is to be considered continuous. Employers shall make hearing protectors available to all employees exposed to an 8-hour time-weighted average of 85 decibels (dB) or greater at cost to the employees. Hearing protectors shall be replaced as necessary...

For additional information regarding this and other standards go to OSHA online @

Noise Reduction Rating (NRR)
The Noise Reduction Rating (NRR) is a measuring system to determine the success of a hearing protector as it filters out and reduces noise, as specified by the Environmental Protection Agency (EPA). The larger the number, the greater the protection and noise reduction. When utilizing two hearing protectors, the NRR approximately delivers five additional decibels of protection more than the higher of the two rated protectors. Example: Using earplugs with an NRR of 28 decibels along with earmuffs with a NRR of 26 decibels would give you a total NRR of 33 decibels.

Duration Per Day(in hours) Max Permissible Noise Level in dB
8 90
6 92
4 95
3 97
2 100
1 1/2 102
1 105
1/2 110
1/4 or less 115

Airgas has, what you need for hearing protection, from earmuffs and bands to earplugs.We have just the right earplug, earmuff or band for every application from running a jackhammer to using your lawn mower.

Earmuffs and Bands