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Earplug Guide

Use this guide to determine which earplugs are right for you.
How are earplugs rated?
Earplugs are evaluated by Noise Reduction Rating, or NRR. This describes the maximum sound level reduction provided by a hearing protection device.

How to use the noise reduction rating
- 1. Subtract 7 from the earplugs' NRR.
- 2. Divide the result by 2 to determine the real-life reduction.
- 3. Subtract the real-life reduction from the environmental noise
level to get the protected exposure level.
Example
- 29 NRR (earplugs) – 7 dB = 22 dB
- 22 dB ÷ 2 = 11 dB
- 90 dB (environment) – 11 dB = 79 dB (protected exposure level)
Faint |
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Moderate |
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Loud |
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Extremely Loud |
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Painful |
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12/08/2019 10:31:26 PM;
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