Originally Posted by toretorden
This is an unsourced statement which is a no-no .. And using I-Doser propaganda as a source (if you're thinking of that) would also be a no-no. You don't know that it alters your brainwaves. You believe that it does. If you wanna claim that it actually has a physiological effect, you should find a serious source to back it up.
Anyways, even registered users on i-doser.com are conflicted about this. Check out the poll from their forums
And they want you to pay for this service .. I would be sceptical.
Sources? Alright. This comes straight out of the I-Doser guide, written by the man who created the concept. This section is "how it works", if you want the next section which is about how it affects you, I can post that as well. As for some people and it not working, of course it doesn't work on everyone! Tylenol has never had an effect on me, regardless of how much I would like it to. Another thing is, the brain is sensitive to any outside stimuli. So even light getting into your eyes can effect it. The more you can focus and have no disruptions, the more the beat will have an effect. And some people get no effect at all, even IF they do it right. It's different for everyone, just as everything is.
"How it Works
When signals of two different frequencies are presented, one to each ear, the brain detects phase differences between these signals. 'Under natural circumstances a detected phase difference would provide directional information. The brain processes this anomalous information differently when these phase differences are heard with stereo heaphones or speakers. A perceptual integration of the two signals takes place, producing the sensation of a third "beat" frequency. The difference between the signals waxes and wanes as the two different input frequencies mesh in and out of phase. As a result of these constantly increasing and decreasing differences, an amplitude-modulated standing wave - the binaural beat - is heard. The binaural beat is percieved as a fluctuating rhythm at the frequency of the difference between the two auditory inputs. Evidence suggests that the binaural beats are generated in the brainstem's superior olivary nucles, the first site of contralateral integration in the auditory system (Oster, 1973)
. Studies also suggest that the frequency-following response originates from the inferior colliculus (Smith, Marsh, & Brown, 1975)
" (Owens & Atwater, 1995)
. This activity is conducted to the cortex where it can be recorded by scalp electrodes. "
Oster, G. (1973). Auditory beats in the brain. Scientific American
Owens, J.E. & Atwater, F.H. (1995). EEG correlates of an induced altered state of consciousness: "mind awake/body asleep".
Smith, J. C., Marsh, J. T., & Brown, W. S. (1975). Far-field recorded frequency-following responses: Evidence for the locus of brainstem sources. Electroencephalography and Clinical Neurophysiology