Theta Brainwaves

[Phillip Mills]

Hi all...

I'm no brain surgeon :)  but i am looking for information of 
BrainWave activity and how different audio levels affects the 
different waves.

I am looking mostly for papers or something similar that deals with 
say "Theta Brain Wave is triggered by a 5-7HZ frequency" etc...

I see now there are alot of people producing little gadgets that put 
out these audio frequencies that the brain responses to.

There was a person (Andew Neher i believe) in the 40's in geramny 
that used to put a certain audio frequency out when hitler was 
giving his speech's.

Is it basically all based around sub audio frequencies?


Any help or pointer would be great!

Thanx! :)

fleep!