What Is the Noise Reduction Rating (NRR) and How to Use It?
When buying earplugs, earmuffs, and some noise-isolating earbuds, you will notice a label Noise Reduction Rating (NRR) together with a number. For example, 3M’s Peltor X5A earmuffs have an NRR of 31, while Howard Leight’s Max Lite earplugs have a comparable NRR of 30. What is the Noise Reduction Rating (NRR)? The NRR is a …
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