Have had tinnitus for years and it hasn’t affected my out of body or lucid dreaming. What does feck it up is anxiety and letting your ego get out of control. Tune the ego noise out and breath and relax listening to the tinnitus and not judging it. Listen to it ebb and flow, change pitch in different ears. It helps meditation and your body falling asleep while conscious. Then the vibrations start and you begin to play with them. Then “pop”. You’re out.