The Bentov bio-medical model, as described in a book by Lee Sannella, M.D., entitled: Kundalini-Psychosis or Transcendence, states that the standing acoustical waves are the result of the altered rhythm of heart sounds which are occasioned by prolonged practice of meditation, and which set up sympathetic vibrations in the walls of the fluid filled cavities which comprise the third and lateral ventricles of the brain.
The energy balloon" , which sets up a pattern very reminiscent of the cosmic egg discussed earlier, not only enhances bodily energy flow and encourages early achievement of a suitable resonant state but it is also designed to provide protection against conscious entities possessing lower energy levels which the participant might encounter in the event that he achieves an out-of-body, state.
Once all of this is achieved, the participant is invited to envisage creation of an “energy balloon” comprised of an energy flow beginning at the center of the top of the head and extending down in all directions to the feet.