First off, I already wear hearing aids daily so I'm trying to keep what hearing I have. Second, my retirement gifts to myself were two suppressors, a Banish 30 and a Banish VK-22. I understand that there is no such thing as Hollywood Quiet, but I was surprised how little the suppressors worked on supersonic ammo.
We all know that hearing damage is caused by loud sounds and made worse by repetition and /or duration of those sounds. The damage is also cumulative. When I first started shooting as a kid there was no use of any hearing protection. I shot everything from .22LR to .458 Winchester Magnums with nothing to block the sound.
As I grew older and more apt to shoot for long periods, I began to use earmuffs. When the first good squishy earplugs came out, I used those because earmuffs get quite sweaty in the South! Now, as a suppressor owner, I am curious as to what really qualifies as "hearing safe" as the manufacturers and salespeople advertise it.
Just the other day I saw one major brand that claimed to reduce a 9mm pistol to 132dB and said it was "hearing safe." One chart I pulled up listed 130dB in the "Use hearing protection or avoid" section. Another says that a jet engine at takeoff is at the 130dB level.
The dB (deciBell) scale is a logarithmic scale. A 10dB increase is 10 times louder. A 20dB increase is 100 times louder! A 3dB increase is consider a doubling in volume. So if hearing protection is recommended for 130dB levels, how is a 132dB level (almost twice as loud!) hearing safe?
I've read the literature on how earmuffs and earplugs carry unrealistic sound reduction levels. So what are we actually getting when we are wearing them? To complicate this, there is a study that shows that earmuffs change the waveform of the impulse sound making the rise and duration longer under the earmuff. (Attenuation of high-level impulses by earmuffs - PubMed) This makes that reduction number even more suspicious.
What I have gleaned from this is that my suppressors are hearing safe only with small caliber subsonic ammo and that if I wear earmuffs, I should probably also wear earplugs (double capping) to protect what hearing I have left. At least my neighbors and my fellow shooters at the range will be happier because "Since each time intensity is cut in half the sound level decreases 3 dB, it follows that doubling distance reduces the sound level by 6 dB" and starting with 132dB instead of 150dB is a big help for them.
The purpose of all of this was to help up a coming shooters protect themselves from hearing damage and avoid spending $5000 on hearing aids when they are old instead of buying more cool guns!
Mods, since I mention suppressors, please move this to the NFA thread if needed.
We all know that hearing damage is caused by loud sounds and made worse by repetition and /or duration of those sounds. The damage is also cumulative. When I first started shooting as a kid there was no use of any hearing protection. I shot everything from .22LR to .458 Winchester Magnums with nothing to block the sound.
As I grew older and more apt to shoot for long periods, I began to use earmuffs. When the first good squishy earplugs came out, I used those because earmuffs get quite sweaty in the South! Now, as a suppressor owner, I am curious as to what really qualifies as "hearing safe" as the manufacturers and salespeople advertise it.
Just the other day I saw one major brand that claimed to reduce a 9mm pistol to 132dB and said it was "hearing safe." One chart I pulled up listed 130dB in the "Use hearing protection or avoid" section. Another says that a jet engine at takeoff is at the 130dB level.
The dB (deciBell) scale is a logarithmic scale. A 10dB increase is 10 times louder. A 20dB increase is 100 times louder! A 3dB increase is consider a doubling in volume. So if hearing protection is recommended for 130dB levels, how is a 132dB level (almost twice as loud!) hearing safe?
I've read the literature on how earmuffs and earplugs carry unrealistic sound reduction levels. So what are we actually getting when we are wearing them? To complicate this, there is a study that shows that earmuffs change the waveform of the impulse sound making the rise and duration longer under the earmuff. (Attenuation of high-level impulses by earmuffs - PubMed) This makes that reduction number even more suspicious.
What I have gleaned from this is that my suppressors are hearing safe only with small caliber subsonic ammo and that if I wear earmuffs, I should probably also wear earplugs (double capping) to protect what hearing I have left. At least my neighbors and my fellow shooters at the range will be happier because "Since each time intensity is cut in half the sound level decreases 3 dB, it follows that doubling distance reduces the sound level by 6 dB" and starting with 132dB instead of 150dB is a big help for them.
The purpose of all of this was to help up a coming shooters protect themselves from hearing damage and avoid spending $5000 on hearing aids when they are old instead of buying more cool guns!
Mods, since I mention suppressors, please move this to the NFA thread if needed.