What you do is to use headphones plus play one steady tone is the left ear at lets say 400Hz, plus inside the proper ear a tone at 410Hz. What might result today is that these 2 tones together create one pulsing tone and it might sound like it originates from the center of the head, merely between a ears. The pulse is 10Hz because this really is the difference between the tones. (410Hz - 400Hz = 10Hz). It has been produced by the brain plus it usually start to stimulate this frequency in a… Continue