The 62.64 and 54.81 frequency weighted tuning forks are based on the Schumann Resonance (7.83 Hz), the natural background pulse of the earth's electrical signal. 

They comprise the 7th and 8th harmonic of this important frequency. These forks can be used separately or together to create a binaural beat of 7.83 Hz that can be applied to the body via the handles or listened to in either ear. 

If you would like to use just one fork, we suggest the 62.64 Hz.

We recommend the use of our high-quality Canadian hockey pucks as an activator for all of our tuning forks, and the Striker Block specifically for weighted forks.