The third and most controversial function is the charging or recharging of brain. A vibration sensor within the ear sends this electric message to the brain to give both it and the body energy. It is created by high frequency sounds fond in Mozart and Gregorian chants. The inner ear, or vestibular-cochlear system, is one of the first sensory systems to develop in the fetus. By the fifth month it is fully developed and sending message to the rest of the nervous system.
Early stimulation is vital to the portal central nervous system.
This stimulation is caused by high frequency sounds. Low frequency sounds, such as heartbeat, breathing and visceral noises are filtered out by the amniotic fluid. Therefore, the most dominating sound the developing fetus hears is the high frequency sound of the mother s voice through bone conduction. Observations concur with Dr. Tomatis s hypothesis that this voice plays an important role on the developing sensory system of a fetus. By the seventh month of development, a fetus has a specific, spontaneous muscular response to each phoneme the mother s voice produces.