Auditory beats in the brain.

1) Oster’s idea was to use the perception of binaural beats as a diagnostic tool because some people are unable to perceive and respond to them. Oster never mentions brainwaves or entrainment as a function of binaural beats. This is interesting since nearly every company advertising binaural beats claims Oster invented binaural beat brainwave entrainment. 2) People with certain neurological conditions, or at certain times of the month (women), vary in their ability to perceive and respond to binaural beats. There is also a gender difference in the ability to process the beats. 3) Binaural beats only form if the two tones are separated by less than 26 hz, 30 at most. This maximum declines as the carrier moves away from 440 hz. Also, binaural beats wane completely past a carrier 1000 hz. 4) According to Oster, the depth of binaural beats is very small (3db). In a test comparison, monaural beats produced a much larger neural response. This seems to follow in line with the research done by David Seiver (Comptronic devices), Transparent Corp and others in regards to monaural and isochronic tones producing stronger entrainment.