I know of a man who is a musician, used to suffer through tinnitus and then went for a medical procedure where he was placed in a chamber and was treated with sound waves and it 100% cured him. Now, as to how much it costs, where it's located, etc. I haven't the foggiest, but you could do a search on him and maybe find a way to contact him.
His name is Ray Hughes, he is a world-class Christian musician and worship leader. Just google him in and I'm sure you'll find him. YOu can prabably e-mail directly and find out about it.
Hope this helps.
Jeff