62.64 Hz Weighted Tuning ForkThe 62. 64 Hz tuning fork can be used separately, or in combination with the 54. 81 Hz weighted tuning fork. These two weighted tuning forks are based on the Schumann Resonance and is the natural background pulse of the earth's electrical signal. They comprise the 7th and 8th harmonic of this influential frequency. These forks can also be used separately or together to create a binaural beat of 7. 83 Hz that can be applied to the body via the handles
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