I've tried this and while it really does seem effective for a minute or so for me, I'm still not convinced that it's not just an auditory illusion, like the tin

I've tried this and while it really does seem effective for a minute or so for me, I'm still not convinced that it's not just an auditory illusion, like the tinnitus is somehow pushed aside by the sensation of the sudden (comparative) silence that starts the instant that you stop drumming on the back of your head.