Indeed. In fact I can get to 1 when its quiet and I have my full concentration. I think the nervous system has a dynamic gain. Its when things are quiet that t

Indeed. In fact I can get to 1 when its quiet and I have my full concentration. I think the nervous system has a dynamic gain. Its when things are quiet that the gain is high enough to tune into the high pitch hum. Hearing it for me is a good sign that I am now ready and in the 'zone'. It is insanely frustrating when you want to get into the zone but cant, at such times i really crave for the hum to start.