- Will
General Performance/Fitness Advice for all
www.BrinkZone.com
LE/Mil specific info:
https://brinkzone.com/category/swatleomilitary/
“Those who do not view armed self defense as a basic human right, ignore the mass graves of those who died on their knees at the hands of tyrants.”
Just to be clear: with one possible exception, there is no data that suggests any semi-auto rifle, firing supersonic ammunition, is hearing safe for the shooter. This is because of back pressure and port noise. The "hearing safe" advertisement was borne of ignorance of the high sound levels a semi-automatic rifle can produce at various points of gas exit when firing.
Often, when microphones are placed both at the standard position 1 meter to the side of the muzzle and at the shooter's ear, the mic at the shooter's ear records noises above 140dB even though the reading to the side of the muzzle may be well under 140dB.
An exception may be the OSS suppressor. I can't recall if tests were reported that showed @ear levels under 140dB or not. The trade offs for that design are a 50-60% increase in weight and significantly louder muzzle report than industry leading designs.
A shooter can fire supersonic ammunition safely with no hearing protection using a manually operated action.
Subsonic ammunition can be hearing safe for a shooter, depending on some variables. With subsonic ammunition, blowback operated firearms may or may not be hearing safe, depending on factors that influence at what pressure gas is released from the chamber end of the barrel. Roller-delayed blowback or locking bolt firearms are reliably hearing safe with a wider set of configuration variables when using subsonic ammunition.
Last edited by Aries144; 09-29-17 at 16:51. Reason: "side," not "size"
One way to make a suppressed AR "quiet" is to shoot one repeatedly without ear pro. Over time, the collective hearing damage will make the suppressor sound surprisingly quiet.
Politician's Prefer Unarmed Peasants
The only time I feel it necessary to wear ear pro with a can is a SBR with Mini can. Otherwise I think you might have sensitive hearing. Not due to hearing loss the , just the opposite. If you need ear pro, wear it. Even with Pro, its much better. So often when crunching down on the gun your ears get manipulated and they don't work great.
Live the dream, suppressed with some protection.
PB
"Air Force / Policeman / Fireman / Man of God / Friend of mine / R.I.P. Steve Lamy"
Plus ça change, plus c'est la même chose.
老僧三十年前未參禪時、見山是山、見水是水、及至後夾親見知識、有箇入處、見山不是山、見水不是水、而今得箇體歇處、依然見山秪是山、見水秪是水。
https://www.instagram.com/defaultmp3/
Bookmarks