By the power of ADHD, I am immune to tinnitus. My left ear rings very faintly, and most of the time I can just completely tune it out because the constant invariable note cannot hold my interest for long. I only actually hear it when the other background noise of whatever environment I am in stops all of a sudden, and the ringing is the only one that remains, and then it gradually fades out like the end of an 80s pop song.
Sometimes I can make it fade out faster by trying to focus on listening to it. The more I focus, the more quiet and distant it gets, until I can't hear it anymore. In the battle of Curse of Infinite Whistle versus Can't Hear Shit Disorder, my ability to simply not notice my surroundings is an immovable object, but the inescapable noise is no unstoppable force.
I consider myself a fortunate man for how often my problems somehow manage to cancel each other out.