My dad has ringing in his ears due to years of working in the machine shop; he says that is why he sleeps with the TV on, because it kind of cancels out the ringing and he doesn't even notice it as long as there is background noise. As far as I know there is no known cure. But, make sure that your doctor is aware of all the medicines, herbs, and supplements you take, because certain things cause tinnitus, like aspirin, if taken at too high dose. I would imagine that there are other things that could cause this as well.