Hodnocení útlumu hluku (NRR)

Noise Reduction Rating (NRR) indicates how effectively hearing protectors such as earmuffs or earplugs attenuate ambient noise. It is most commonly used for passive hearing protection in loud environments like construction sites or shooting ranges.

How NRR works

The NRR value is expressed in decibels (dB) and tells you how much sound is reduced before reaching the ear. A higher NRR means better noise reduction and stronger hearing protection.

Example

If you are in a 100 dB environment and wear hearing protectors rated NRR 30 dB, your effective noise exposure is reduced to about 70 dB (subject to correction factors like those from NIOSH).

Applications

• High-noise workplaces (e.g., construction, industry)
• Shooting sports and military training
• Motorsports
• Noisy hobbies (e.g., chainsaw use)

Note

NRR is a standardized rating used primarily in the US (EPA). In Europe, the SNR (Single Number Rating) system may also be used.