FoghornLeghorn
New member
I asked an audiologist yesterday, but she didn't know.
I always thought the NRR on a pack of ear plugs meant that was how much they reduced the noise.
Then I read that to determine the true noise reducing effect, one subtracts seven from the NRR and divides by two.
http://www.coopersafety.com/noisereduction.aspx
That means if my plugs have a NRR of 27-7/2=10. So if I'm firing a weapon = 169dB and only wearing earplugs, the noise hitting my ears is 159dB. That's still well above the instant damage level. Even wearing muffs, you only add 5dB to the protection which still equates to instant damage.
Is this accurate, because if it is, it's no wonder so many shooters have to yell at each other.
Oh, and the audiologist determined that I have mild hearing damage in my left ear and mild to moderate in my right. Dunno exactly what to blame. Loud music. Construction equipment. Bird hunting.
I always thought the NRR on a pack of ear plugs meant that was how much they reduced the noise.
Then I read that to determine the true noise reducing effect, one subtracts seven from the NRR and divides by two.
http://www.coopersafety.com/noisereduction.aspx
That means if my plugs have a NRR of 27-7/2=10. So if I'm firing a weapon = 169dB and only wearing earplugs, the noise hitting my ears is 159dB. That's still well above the instant damage level. Even wearing muffs, you only add 5dB to the protection which still equates to instant damage.
Is this accurate, because if it is, it's no wonder so many shooters have to yell at each other.
Oh, and the audiologist determined that I have mild hearing damage in my left ear and mild to moderate in my right. Dunno exactly what to blame. Loud music. Construction equipment. Bird hunting.