The spiritual masters of India believed the musical tone sadja or sa (which means the father of all others), to be the musical sound which resonates with the never ending primordial vibration om. They arrived at sa through deep meditation. To this day, Indian musicians tune their instruments to OM to set the Spiritual tone for their performance and globaly we recognise the meditative and spiritual significance of OM.
This tuning fork is tuned to 136.1hz which is the vibration of OM, or of the Earth. Swiss scientist Hans Cousto discovered how to convert planetary cycles into musical pitches. Using his system, OM corresponds to the sound of one year it takes the earth to circle the Sun. To arrive at the frequency of 136.1 Hz, an earth year is reduced to a second (frequencies are measured in cycles per second). An earth year is 365.242 days and an earth day is 86,400 seconds. When the days are multiplied by seconds the answer will be 315,567,925.9747 seconds equal one earth year. To arrive at an audible sound, 315,567,925.9747 seconds are divided into one (year) and then raised 32 octaves. The result will be the audible tone of answer 32 times the result will be 136.1 Hz. The cosmic note OM.
Hold your Earth tuning fork by the stem between your thumb and first finger. Do not apply a lot of pressure. Gently tap the weights on your knees, tapping pad, or palm of your hands. This will set the weights in motion and create a clear, deep and sustained tone. Bring the double-pronged side of the Earth fork about an inch from your ear(s) and adjust the distance for volume. You can use this pitch as a guide for chanting, or simply for listening or meditating.