Jan1, 2021 - Brainwave entrainment is a method to stimulate the brain into entering a specific state by using a pulsing sound, light, or electromagnetic field. The pulses elicit the brain's 'frequency following' response, encouraging the brainwaves to align to the frequency of a given beat.Pain Relief - Music embedded with subliminal Brainwave Entrainment Frequencies - Contains no verbal or any other suliminal sounds.  Music by KRMedia.