I'm a musician, among other things. I played loud rock & roll in my youth-to the point my ears rang for days. I have also double-tapped a .30 carbine pistol in a car, and shot .38 special in a house, had 7.62 X 39 shot near me without protection, etc. Such is life. At 58, I do have some degree of hearing loss. While one incident can cause hearing loss-it certainly won't deafen you.
I think I did more damage with loud music and the unintentional unprotected AK shooting than even the .30 carbine (and they are LOUD in a pistol!) I still enjoy music, and can still play.