I am only 25 and mine is absolutely absurd... Whenever I am in a room with complete silence it is almost unbearable at times. Sounds like a medium pitch (but still high) loud tone bouncing off the walls...
No secret where mine derives from though, I grew up at a bracket racing dragstrip & never used ear protection - then from 17-21 i threw 100-110 massive edm events (mostly in midwest) where we would have a minimum 120-half a million watts of sound inside these venues - and again I never used any ear protection. The worse part about that was the thousands of people every night that come up and scream something into your ears over top the loud music... haha It only compounded the problem in my case i think because I am damn near deaf now
wear your ear protection kids ;)