Interestingly, there was a former member here who suffered from tinnitus, and said that kava was the only thing that caused it to stop. When I was a child, my hearing was more sensitive to high pitched sounds (like everyone's was), and that was a long time ago, when televisions still had vacuum tubes. I could hear this high pitched whining whenever the TV was on. I realized later that my parents and other adults could probably not hear that sound. Anyway, I have not had tinnitus, but I imagine it would sound kind of like that vacuum tube whining sound, and see how it could be quite annoying if you heard it all the time. The "ear-ringing" from kava is kind of like that, but it is not annoying at all.