I have had tinnitus and it was pretty terrible the first year but I got used to it almost completely. Then I woke up one day with a new thing called diplacusis where I hear a tone on top of sound for certain frequencies. So my wife says hi how are you and I hear that plus a tone for each word. It sounds kind of like the radios in the xwings in Star Wars. I’ve been adjusting for 3 months but it’s very hard to habituate. Fortunately it has softened in that time. But it seems to be extremely rare associated with a sudden dip in one of the hearing ranges where the rest of hearing is mostly normal. Oh well...