I had tinnitus when I was on the line at UA. I was sent to an Otolaryngologist and he said that nothing I do will make it go away. Believe what you want, I'm just telling you what he told me. He also told me that it may have been caused by some drug I may have been taking, even aspirin may cause it. It's actually getting worse. The doctor told me that some people have to be sent to a psychiatrist because in some cases some people have been known to start to go nuts with it. (He didn't use those exact words, so I paraphrased it.) After 30 years of flying, I retired, but I still hear, "Heading one-eight-zero and contact the tower." That's worse than the tinnitus. Wait until you retire. Sometimes I wake up in the middle of the night and try to remember what hotel I am in.