A binaural beat is an apparent sound that is perceived by the brain. This one will produce a phenomenon which results in pulsations of low frequency, and that when two tones with slightly different frequencies are perceived with each ear of the subject.
The Right Beat
A beat will be perceived as if the two sounds mix naturally outside the brain. The frequency of the tones must be less than approximately 1000 to 1500 Hz, for the beat to be perceived. The difference between the two frequencies must be rather small (less than 30 Hz) for the effect to occur, otherwise the two tones would be heard separately and no beat would be heard.
The interest of binaural beats can be classified into two categories. First, there is an interest in the work on the sense of hearing. Second, binaural beats can influence the brain in more subtle ways, and can also be used for relaxation or other health benefits. The use of the binaural beats meditation comes perfect there.
Heinrich Dove discovered binaural beats in 1839. While research on them continued after that, the subject remained a sort of scientific curiosity for 134 years.
Oster also noted gender differences in the perception of beats: women seem to have two distinct peaks in their ability to perceive binaural beats, with specific points in the menstrual cycle.
The effects of beats on consciousness were first examined by Robert Monroe who created binaural self-development by founding the Monroe Institute: a center for binaural research and education. The Monroe Institute presents, among other things, binaural beats as a means of training the synchronization of the cerebral hemispheres.
How it works?
Depending on the frequency, the subject may experience different sensations. In theory, the oscillations in the brain are divided into four intervals depending on the frequency (Hz, one hertz being one ripple per second):
Delta (O, 5 to 4 Hz) this frequency is normally generated in deep sleep, or when one is unconscious.
Theta (4 to 8 Hz) is the interval between sleep and wakefulness, in which dreams and hallucinations occur. It happens just a little before you fall asleep at night, or just before you are really awake on
Alpha (8 to 13 Hz) This is produced when you are awake and fully aware, it produces a relaxing effect, like when you try to remember something, or when your eyes are closed.
- Beta (13 to 30 Hz) It is normally when you are awake, with maximum attention, that deals with the outside world. It is also generated when you solve problems, such as mental calculations. We also speak between 35 to 80 Hz of Gamma frequencies, which are linked to intense intellectual activity, such as in the creative process or solving difficult logic problems or again the excitement.