Binaural Beats work by broadcasting two separate frequencies in each ear. For example, if you wanted to tune your brain to a 7 Hz frequency, you could play 200 Hz in your right ear, and 207 Hz in your left ear. The brain will compensate for the difference between the two and produce a third tone that will be exactly 7 Hz. This will result in your brain frequency being lowered and tuned to the desired 7 Hz operating stage.