Does OSHA require companies to divide the Noise Reduction Rating (NRR or NRR-7) in half?
When it comes to assessing feasibility of engineering noise controls, OSHA requires that employers estimate real-world hearing protector performance by "de-rating" NRRs by 50%. However, when it comes to complying with hearing conservation program requirements, OSHA does not require de-rating the NRR (or NRR - 7 for A-scale noise measurements).
Read more in our SoundBytes articles:
- I've seen headsets and hearing protectors advertised as "OSHA approved" - what does this mean?
- My job can be boring. Is it OK if I listen to music headphones while I'm working?
- What is NRR or Noise Reduction Rating?
- What is the Personal Attenuation Rating (PAR)?
- Why do OSHA formulas require us to subtract 7 dB from the Noise Reduction Rating (NRR)?