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Brainwave Stimulation Mechanisms
The types of brainwave stimulation we employ in our products make use of two powerful mechanisms to enhance your state of consciousness:
1. Brainwave Induction
Also known as brainway entrainment (not to be confused with "entertainment", entrainment means a signal is synchronized with another, as would they move in the same train), brainwave induction is the process, by which the brain slowly adapts its vibrational patterns to match those of an adjoining source, in our case the carefully engineered tones that produce the binaural or monaural beats. Eventually the binaural beat causes the brain to lower its brain wave pattern to states of enhanced concentration, profound relaxation or deep, thoughtless meditation, according to the target brain wave range used (alpha, theta or delta).
When two tones of slightly different frequencies are transmitted through the air, they will interfere constructively and destructively with each other, according to the constantly changing phase between them. This physical process becomes audible as a third monaural beat; a constant humming due to the cyclic modulation in the signal’s amplitude.
If these two signals do not share the same physical space, but are fed to the brain through the left and right ears separately, as when using stereo headphones, there will be no interference, but the third beat will still be produced unconsciously in the brain.
This occurs, because the brain confuses both similar tones to be the same one, and automatically assumes that the perceived difference in phase is caused by the arrival of this sound from a flank. Only that the brain can never deduce the angle of arrival, because in reality there are two tones and the phase between them changes constantly.
The rate at which the mutual phase between these tones change is not consciously perceivable. Nevertheless it does resonate inside the brain, and at the precise frequency of the binaural beat.
Repeated and prolonged listening to binaural beats induce in this way the corresponding frequency in the rest of the brain processes, ultimately dominating the global brainwave pattern at the desired beat.
2. Brain Hemisphere Synchronization
The second mechanism is a nice side-effect from the brainwave induction process described above.
Because the brain is not accustomed to hearing individual tones of different frequencies through each ear, it needs to create new neural pathways between the left and right hemispheres in order to process and handle this stimulus. As an effect, continuous use of binaural beats also improves cross-communication and balance between the two brain hemispheres.
The brain is divided into two hemispheres or lobes, and each side processes information differently. We tend to interpret and process information according to which side is our dominant one. The notion that one side of the brain is solely responsible for reason, and the other for emotion no longer holds true within the scientific community. What is well understood and accepted, however, is that in the left hemisphere resides the capacity of narrow focus, while the right hemisphere maintains the broad understanding of implicit meaning. The left side of the brain has functions associated with logic; it functions in a linear way. The right one is responsible for our traits that involve emotion and intuition. It works in a nonlinear manner and is the one that keeps the big picture in view.
Listening to Binaural Beat Audio regularly trains the human brain to process different signals from the right and left ears and interpret them as a unified signal, which is consonant with the brain wave frequencies known to result from and also produce relaxed states of mind. Through this passive exercise the brain is working in a balanced way, since both right and left cerebral hemispheres are functioning symmetrically. Over time the brain begins to get used to this balance, what is known as whole-brain thinking, or whole-brain functioning. A person who uses the brain in this way develops both logic and artistic skills in a balanced way, therefore increasing their intelligence. By using the brain in a balanced way we can combine the left-side trait of "knowledge of the part" with the right-side capacity of "wisdom of the all", as Frontier Psychiatrist Iain McGilchrist so well described it (see a video of him explaining the functions of the brain hemispheres here).