Each person is born sympathetic to cycles, vibrations and oscillations occurring at the time of birth. This person will resonate with those tones throughout life. These frequencies constitute their "chord of birth" or "chord of life" not unlike Keely's "chord of mass".
See Also
Birth
Birth Cycle
Chord
Chord of Life Windchime
Cycle
Part 27 - The Cycles of Life
Self Mastery and Fate with the Cycles of Life
The Chord-Settings of Life
8.21 - Signature same as Chord