7.83 Hz Schumann Resonance Binaural Tuned Healing ChimesThis listing comes with two tuned chimes, hanger, and mallet. The 7. 83 Hz Schumann Tuned Healing Chimes are tuned to create a 7. 83 Hz binaural tone when both tubes are played next to each other. This frequency is so deep that it can't be perceived naturally. By playing two tubes tuned exactly 7. 83 Hz apart, a third tone equal to that difference will be perceived, created by the microtonal oscillations between the two primary tones. The Schumann