High Noise Communication
Respirator Communication
In-Suit Communication
General Plant Communication
Plant Tour Communication
Intrinsically Safe Environments
Moderate Noise Environments
Hearing Protection
Social Distancing Communication
WildEar for Recreation & Home
Talk Through Your Ears®
EarzON® Custom Hearing Protection
RadioGear® Listening Earsets
Filtered Hearing Protection
CellEarz™ Cell Phone Accessories
TourEarz™ Tour & Training Systems
ClearTalk™ Voice Amplifier
Headsets
Two-Way Radio Solutions
Lapel Speaker Mics
Radio Harnesses
Earmuffs & EarplugsFAQ
If a worker wears both earplugs and earmuffs at the same time, how much increase would you expect in the Noise Reduction Rating (NRR)?
The OSHA Technical Manual allows employers to add 5 dB for the second hearing protector. An example: if wearing an earplug with an NRR of 25 together with an earmuff (also with an NRR of 25), expect a combined NRR of 30. Keep in mind, however, that this rule of thumb is a general estimate. To learn more about the ins and outs of dual hearing protection, and how to improve accuracy of your estimates, see this SoundBytes article.
Related FAQs
- 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 the 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)?
Categories
