Humming is good too. Generates NO bubbles. You know, the Ohmmmm
sound? The humming. It's the same magic that's in nitroglycerine
pills to jumpstart your heart, what CoQ10 makes for you, what's
in Viagra... same little bubbles... helps form memories in the
brain. I did research on it a couple of years ago. Little
bubbles. So, yeah - the omm thing has definite tangibles.