I'm deaf and wear a couple Phoenix aids that cost me over $5000. They cut off when I shoot.
I'm not deaf from shooting. Always wore muffs. Had to take a drug for a bone disease that had a 1% side affect (lucky me) that it killed the little hairs in your inner ear. Long done taking that stuff now.
I'll soon be followed in my almost deaf little world by many young people who are destroying their hearing playing music so loud even I can hear it a block away. And they've got their windows shut!
And I fired a 454 Casull once. Never again. Hurt my wrist. And if I cover my hearing aids too tightly I get loud feedback. The Walker's etc. will do the same thing.