Same here. TBI from Iraq. Constant tinnitus but I don't hear it when diving as there's "bubble sounds" and other noise that distract from the ringing.
I do notice I can't hear my computer beeping when it gives alerts. I have to see the screen blinking the red or yellow warning. When I first got it I thought it was not working properly and the sound wasn't working, but dive buddies tell me they hear it, so it must be hearing loss in my right ear and the tinnitus ringing.
Spearhead/Long Knife '88 - '92