A.I.T. also known as D.A.A (Digital Audio Aerobics.is a form of sensory stimulation which uses electronically modulated or filtered music to help retrain the ear and auditory system to work correctly. Dr. Guy Berard, who developed AIT, believed that hypersensitivity to sound, hearing distortions and delays in auditory signals could contribute to inefficient learning or learning disabilities.
Dr. Bernard Rimland's research found that 40% of people diagnosed with Autism suffered from hyper-processing of the auditory stimuli or 'hyperacusis' which would lead to social withdrawal, speech problems, tantrums and aggression. AIT has been shown to help improve dyslexia, speech/language development, responsiveness, activity levels, sensory processes, and social skills.
Retraining the acoustical reflex (muscle of the inner ear) helps target the areas of hearing where there are difficulties and even them out as much as possible, so that the child is not hypersensitive to certain frequencies which may act as a stimulus or trigger of unwanted behaviors in certain situations.
The process involves 20 sessions for 30 minutes with the child listening to modulated music tracks, 2 times each day for 10 days. If the child will actively participate, an audiogram is done at the start of the sessions and again at the half way point.
"The results of this study indicate that a course of AIT is likely to have significant beneficial effects for children with a diagnosis of Autism." 2002 blind study by Rosalie Seymour, Speech Therapist and Audiologist