The frequency of the tones must be below about 1,000 to 1,500 hertz. The difference between the two frequencies must be small (below about 30 Hz) for the effect to occur; otherwise the two tones will be distinguishable and no beat will be perceived. The effect was discovered in 1839 by Heinrich Wilhelm Dove References : http://en.wikipedia.org/wiki/Binaural_beats
June 5th, 2006 at 7:56 pm
From what planet did you originate???
References :
June 5th, 2006 at 9:15 pm
ooooooooooo.kkkkkkkkkkkkkkkkk.
References :
June 5th, 2006 at 11:48 pm
The frequency of the tones must be below about 1,000 to 1,500 hertz. The difference between the two frequencies must be small (below about 30 Hz) for the effect to occur; otherwise the two tones will be distinguishable and no beat will be perceived. The effect was discovered in 1839 by Heinrich Wilhelm Dove
References :
http://en.wikipedia.org/wiki/Binaural_beats
October 16th, 2008 at 1:05 am
4 – 7 theta
8 – 10 low alpha