Specially programed tones like music to treat stressed people to calm down
How Binaural Beats Calm the Brain
Decades ago, scientists discovered a surprising effect of sound waves below about 1500 Hertz (Hz). If the right and left ear are offered slightly different tones at the same time, a new acoustic signal is created. One now perceives a pulsating single tone, whose volume modulation corresponds exactly to the difference between the two tone frequencies.
An example: On the left ear, the chamber tone A with 440 Hz is audible and on the right a slightly raised tone with 450 Hz. Subjectively, a single signal with 445 Hz is now perceived, which pulsates with a frequency of 10 Hz and is probably generated in the brain stem. The clearly perceptible vibration (“beat”) is decisive for the therapeutic effect of the so-called binaural effect, because in this way the brain is stimulated to follow the given clock frequency. Because the brain electrical impulses also vibrate – with frequencies of over 30 Hz (wide awake) to 0.1 Hz (deep sleep). And it is precisely here that the increased brain activity can be specifically calmed down by a gradual lowering of the acoustic signal frequency.