Sound; tone, vibration. Metaphysically, the mystic sounds of the Eternal, of which the highest is the transcendent or Soundless Sound, Paranada, the first vibration from which creation emanates. From Paranada comes Pranava, Aum, and further evolutes of nada.
These are experienced by the meditator as the nadanadi shakti, “the energy current of sound,” heard pulsing through the nerve system as a constant high-pitched hum, much like a tambura, an electrical transformer, a swarm of bees or ashruti box. Most commonly, nada refers to ordinary sound.CreativeMinds WordPress Plugin CM Tooltip Glossary