5:59 pm
NWBA Member
March 7, 2018
Hello!
I'm a total newbie here, attending my first course in just a few days.
For hearing protection is there a general guideline for minimum decibel reduction for hearing protection?
I got some 3M Optime 105s which reduce by up to 30dB, and for anvil hammering it looks like it goes anywhere from 90-130dB. So in the extreme case of 130dB, is -30dB going to be enough?
Would you all recommend something better, like with noise cancellation circuitry?
Thanks!
7:01 am
NWBA Member
July 23, 2016
6:22 pm
NWBA Member
March 7, 2018
7:58 pm
NWBA Member
Board Member
April 26, 2010
NIOSH guidelines say that 75db is safe, and that we can get away with exposure to 85db for 8 hours at a time. NIOSH says that for every 3db above 85 the exposure time limit should be cut in half.
The rule of thumb is that if we must shout to be heard by someone nearby, the noise is loud enough to cause damage.
I recall from my Navy days that the degree of sound which causes damage is less than the degree of sound which causes pain. I also remember something about impact noise being worse than constant noise.
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