Path: utzoo!mnetor!uunet!husc6!tut.cis.ohio-state.edu!bloom-beacon!gatech!udel!princeton!phoenix!andy
From: andy@phoenix.Princeton.EDU (Andrew M. Milburn)
Newsgroups: comp.sys.amiga
Subject: Re: Sonic Tomfoolery
Message-ID: <2000@phoenix.Princeton.EDU>
Date: 9 Mar 88 00:37:07 GMT
References: <8802251858.AA21577@cory.Berkeley.EDU> <719@ur-cvsvax.UUCP> <4292@xanth.cs.odu.edu> <1527@sugar.UUCP> <908@rmi.UUCP>
Reply-To: andy@phoenix.Princeton.EDU (Andrew M. Milburn)
Organization: Princeton University, NJ
Lines: 20

In article <908@rmi.UUCP> shimoda@rmi.UUCP (Markus Schmidt) writes:
>
>Hi!
>
>There's just another way to the effect.
>I know of someone, who uses this to enter relaxed and alternate
>states of mind.
>The theory is, that if the two ears hear slightly different tones,
>the two parts of the brain try to meet. Thus the are syncronizing
>their activity and lead to alternate states of mind.

Yeah, I've played with this a little.  In the (admittedly feeble)
literature it's referred as the Hemisync Effect.  It gets
used by people in sleep and dream research to shunt subjects
through various states of waking/sleeping/dreaming.

I built a grungy little amiga program to try and produce these 
effects with no success.  The problem seems to be that
only a very few ratios between the tones are effective and
nobody has published them.  Any leads?