Difference in the energy generated from audible chanting (Vaikhari or verbal) and that of inaudible sound

The difference in the energy generated from audible chanting (Vaikhari or verbal) and that of inaudible sound will be understood from the following example. The radiance generated from chanting in the audible mode for thirty years will suffice to heat one glass of water upto its boiling point. As against this, a mere thirty seconds of inaudible chanting gives the same results –  Paratpar Guru   His Holiness Dr. Jayant Balaji Athavale