bigunit
WKR
No love for the iso tunes here? I was thinking of buying the caliber ones.
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Thank you Sir.shotguns need less protection as they are quieter, 150-155 db. Rifles run 160-170 range. Foam plugs run 15-30 depending on the fit and user skill. Custom plugs run 25-27, yes foam tests better than customs. I worked for a lab and we tested our stuff. Muffs run 15-25 with glasses. The slit leak from the glasses reduce the effectiveness of muffs. Also muffs can be lifted off the head in larger blasts. Double protection is 45-50, limited by bone conduction.
With all that said, single protectors, plugs or muffs may get you below 140 which is what is needed for a single shot. For 100 shots you need to be under 130. That takes double protection for a rifle, a single protector will do it for a shotgun, but only if worn correctly.
For 1000 shots, maybe a rso or score keeper, you need to be under 120. Even double protection is marginal for a rifle. Shotgun, no problem.