In the broadest definition, sound stimulation can be defined as the excitement of the nervous system by auditory information. Sound stimulation auditory retraining narrows the focus. In this context, a precise application of electronically processed sound, through headphones, can have the effect of retraining the auditory mechanism to take in a wider spectrum of sound frequencies. An ear that cannot process tone properly is a problem of great magnitude. Sufficient auditory tonal processing is a prerequisite to normal auditory sequential processing.
Dr. Alfred Tomatis (1920-2001) is highly recognized as a pioneer in the emerging field of sound stimulation.