Thank you Michael, I understand what you are saying. I do not use headphones, in ear or over, but am unable to sleep, I have a white noise machine but it doesn't cut it. For my cause of tinnitus I entered "Flight", because I was fine before the flight, got on the plane as fit as a flea, got off wobbly and then the tinnitus started.
I haven't been lucky with ENT, they just diagnosed whatever was next on their list, Labyrinthitis, then Mènière's, then vestibular migraine, then MdDS, then PPPD! The latter is one size fits all.
All I was offered was antidepressants and maskers. I refused the antidepressants but the maskers are a lifesaver for me, but you aren't supposed to sleep in them.
I'm 4 years in and lack of sleep is killing me.