I know I have lost atleast 60% hearing in my right ear and about 25% in my left ear
from being stupid and having a 150+db stereo system in my vehicles. That and shooting guns with no muffs/plugs in when I was a kid. I will have ringing atleast once a day or so sometimes its different tones and then goes away. Having 6-7 concussions doesn't help either LOL If only I would of known that hearing in your 30's-40's+ is important