31dB Noise Reduction: This noise cancelling ear plugs have a noise reduction rating (NRR) of 31 decibels to protect your ears in noisy environment, the filter membrane and cotton will filter sound ...
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Effective Noise Reduction - The ear plugs noise reduction ... These comfortable ear plugs for sleeping help preserve your hearing and provide you with some peace in a noisy world.
The highest NRR for earplugs is 33, so that’s what to look for if you are seeking maximum noise reduction. However, a 33 NRR may not be totally necessary for sleep — the measurement is ...