Binaural beats is an emerging form of sound wave therapy. It makes use of the fact that the right and left ear each receive slightly different frequency tones, yet the brain perceives these as a single tone.
Delta Pattern: Binaural beats in the Delta pattern operate at a frequency of 0.5 - 4 Hz with links to a dreamless sleep. People who receive a delta pattern frequency enter a deeper stage of sleep according to electroencephalogram (EEG) brain scan results. Delta pattern also helps getting access to the subconscious mind.