Jain philosophy distinguishes between word and speech. A word is a sound produced by the movement of tongue and is a physical phenomenon accomplished with the help of brain, mind and prana. Imparting the intended meaning to the word is a mental and psychic process. The mental resolve to speak makes the speech biopotential karma to rise emitting a karma wave. This wave attracts appropriate sound vargana from the cosmos. The incoming sound vargana waves interact with the conscious mind and are conditioned to carry the intended meaning. The resultant wave is superimposed on to the sound wave produced in the throat giving rise to the speech wave. The speech wave travels in the space medium, usually air, and reaches the ear of the recipient subject who grasps the meaning carried by the wave with the help of his brain, mind and the ear mechanism.
Thus sound vargana fulfills the need of producing speech and transmitting the information to the recipient subject.