Thanks to Maverick, he's got his facts straight. Similar to sound-cancelling headphones... which are way less than 1500USD$ In the past I had access to a set of sleep CD's that really worked. I could put that on the stereo and be sleeping in about ten minutes, deeply. THe mind is an amazing thing capable of being controlled by many outside or chemical influences... that's what makes the mind such a wonderful ting to play with.... Isn't that what we are all doing here, playing mind games>? Peace, ~Payaso