Choosing Hearing Protection: NRR Explained
Earplugs and earmuffs are rated by their Noise Reduction Rating (NRR) in decibels. The real-world protection is usually less than the label, so it pays to understand the number.
Key points
- NRR is the lab-tested decibel reduction printed on the packaging (e.g. NRR 30).
- Real-world reduction is lower; a common rule subtracts 7 then halves the NRR for actual protection.
- For very loud environments, you can wear earplugs and earmuffs together for extra reduction.
- Match the protection to the noise: higher NRR for ranges and heavy machinery.
- A proper fit matters more than a high number — poorly seated plugs leak sound.
FAQ
What NRR do I need for shooting?
Gunshots reach 140–160 dB, so use the highest practical protection — often earplugs plus earmuffs together — to bring exposure to safe levels.
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