I'm 24 and have tinnitus in both ears. I credit it to being in artillery. I worked where I was directing the guns with numbers etc so I couldn't wear hearing protection so I didn't mess anything up and fire where we weren't suppose to.
Also had an ear plug fall out during an ammo dump. 30 marines, 120 rounds each in about a minute gets very very loud.
Mine comes and goes as it pleases but otherwise my hearing is fine
Segui il tuo corso e lascia dir le genti - Dante
Blaming guns for crime is like blaming the planes for 9/11