I have read that they are much more effective than Binaural beat entrainment devices. But I can't seem to find any sites selling them.
look below…hope that helps
I have a hemi-sync for lucid dreaming. is it to be used with headphones?
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November 13th, 2007 at 8:35 am
look below…hope that helps
References :
http://www.mindmachines.com