View Tag: ‘Noise Reduction Rating’
Noisy Notes: NRR AND CUSTOM-MADE HEARING PROTECTORS
by Alberto Behar, PEng
Noise guru Alberto Behar answers some questions regarding the use of the term Noise Reduction Rating, especially when dealing with custom-made hearing protectors.
THE (IN)FAMOUS NRR – NEW DERATING
with Alberto Behar, PEng
In this issue’s Noisy Notes, Alberto Behar writes about the (in)famous Noise Reduction Rating.