From personal experience, as a teenager, damaged my hearing through shooting without hearing protection (shotguns, 30-30 hunting, and .357 outdoors and on occasion from the cab of the truck at jackrabbits), and listening to LOUD rock music. DUMB...DUMB....DUMB!!
My kids KNOW there will be a beating if they refuse to wear hearing protection. They see my father and I saying "huh?" a lot. The ringing DOES NOT go away.