sleepyjosh wrote:
Now here comes the kewl part. That pulsing doesn't "really" exist. It's all an illusion, created inside your brain, based on a slight difference in the pitch of the tone coming in one ear versus the tone in the other ear.
yes! thank you for mentioning this aspect. It incites the brain into hallucination.
here is an excellent example of binaural holophony (earphones a must):
http://www.virtualbarber.org/page.php?32
here are some tonal hallucinations:
http://www.virtualbarber.org/page.php?13
On that last link, the effect of the Deutsch's Scale Illusion is my favorite to work with. Take one ear bud in and out as you listen to hear the sounds change.
As sleepyjosh said, when the brain has been rendered into this state, it is more suggestible. Tibetan Singing Bowels are also said to have a similar effect.