Interesting stuff. Since bass is my primary instrument, I do operate in the 24 > 100 Hz. My monitors aren't that good at reproducing those pure frequencies. Not to worry. I can mix low stuff using headphones if need be.
I also have a spot of tinnitus which operates around 14-16KHz. Never had a formal diagnosis as it's just an annoyance. I 'self diagnosed' the frequency damage using an on-line test which compares the hearing of young people with adults.
Moral of the story is, people, protect and love your hearing!