The brain integrates the two signals, producing a sensation of a third sound called the binaural beat.
For example, if a frequency of 100 Hz is played in one ear and 107 Hz is played in the other ear, a binaural
beat of 7 Hz is created by the brain.
Brain waves match or “follow” the binaural beat. If
the binaural beat is 7 Hz, an increase in brain waves of 7
Hz occurs.