Stutterers, he found, were arrested at a 2-4 yr. speech level and also were unconsciously aggressive. Again, through unique electronic feedback, he cured most stutterers who came to him for treatment. Here too, he observed personality changes as they became free of their impediment. The greatest personality changes occurred in autistic children. An embryo-fetus, he says, hears various sounds, including the mother's voice, from a much earlier age than had been previously thought.
Autism is non-listening carried to extremes.
But listening is active and involves the will of a person. The entire body is affected and, It is impossible to listen without involving oneself. Listening is the most important perceptual capability to be cultivated. The breadth of Tomatis assertions is striking. There is something disturbing for everyone from Tomatis observant, unfettered and fertile mind.