It works just to calm down one of my T noises; I play it in the background and it just seems to distract me and sometimes bring the T down for a bit by a few dozen percentage points. I just use http://generalfuzz.net/acrn, GeneralFuzz should be given some sort of medal for making that site!
Yeah, I tried it. But I never did good at finding my exact pitch and mine fluctuates a lot in pitch also, so nothing there for me :/ But, I'm glad it helps you somehow.