There's a book I'm reading by a guy named Pete egoscue, called Pain Free. He has a clinic where he treats structural problems (back, knees, hips, neck...anything a chiropractor would treat.) Anyway, he has a series of exercises that he has developed to deal with different problems. He claims a 98% success rate with compliant patients.
I have no idea if his exercises work as well as advertised, but the way he describes how the structure of the body functions makes a lot of sense. Anyway, he has a series of exercises he recommends for vertigo, which he recommends for tinnitis as well.
You really have to buy the book (less than $15) to see the exercises; I couldn't really describe them here. Anyway, here's his take on tinnitis, fwiw:
tinnitis is a condition that often accompanies headaches, poor balance, and positional vertigo. Like the others, its principal effect, ringing of the ears, can be addressed by repositioning the head. The ringing is literally an alarm that is telling us that the inner ear doesn't like the position of the head.
No idea if this is true. It almost reminds me of chiropractors who claim to be able to fix just about everything through manipulation.
I have mild tinnitis myself; I will probably give the exercises a shot when my lower back gets better.