Re: [sbagen] volume effects

[Jim P. <ji...@ua...>]

Rick wrote:
> From what I have read the amplitude of brainwaves generated by
> binaural beats is inindependentf the amplitude of the carrier
> frequencies. Also, the binaural beats is perceived because the waves
> travel across the skull of the listener.=20

You may be confusing things here.  The reason that higher frequencies
are not used (>1500Hz) is that they apparently travel through the
skull instead of around it, and hence are no good for the brain to
gain directional information, and are ignored by that part of the
brain.  So, the lower frequencies do travel around the skull -- but
only in normal conditions where the sound source is from an external
event that the brain wants to establish the 2D/3D location of.

However, when listening to binaural beats, we are not trying to get
the waves to travel around the skull, because we are feeding the
sounds directly into the ears.  We are using the brain's hard-wired
position detection 'hardware' in a way not anticipated by nature, to
cause the interesting side-effect of a gentle internal stimulus for
brain-wave entrainment.

At least that is the theory as I understand it.


> So, do the carrier waves have sufficient strength to travel across
> the skull if it is too low? Whether the binaural beats actually
> effect the EEG of the person is a totally different question.
>=20
> I am no expert but after reading the theory behind them I got a lot
> of doubts.

You are welcome to disbelieve or have doubts, but I think that the
only way to answer the doubts is to try it and see.

If you don't want to experiment with sbagen, you could try the demo on
the CenterPointe site (so long as you can put up with Bill Harris
talking all the way through it!), or maybe at the Monroe Institute
(although I can't find a demo track on there right now):

  http://www.centerpointe.com/index.php?page=3Ddemo
  http://www.hemi-sync.com/

Jim

--=20
 Jim Peters                  (_)/=3D\~/_(_)                 ji...@ua...
                          (_)  /=3D\  ~/_  (_)
 Uaz=FA                  (_)    /=3D\    ~/_    (_)                http:/=
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 SBaGen: binaural beats for brainwave entrainment:  http://uazu.net/SB