A theory of speech motor control and supporting data from speakers with normal hearing and with profound hearing loss

Abstract

A theory of the segmental component of speech motor control is presented, followed by supporting data. According to the theory, speech movements are programmed to achieve auditory/acoustic goals. The goals are determined partly by "saturation effects", which are basic characteristics of speakers' production systems that make it possible to produce a sound output that has some relatively stable acoustic properties despite a somewhat variable motor input. The programming of articulatory movements to achieve auditory goals utilizes an internal model (or "mapping") of relations between articulatory configurations and their acoustic consequences. The internal model is acquired and maintained with the use of auditory feedback. The supporting data for this theory come from experiments on speakers with normal hearing, cochlear implant users and a patient with neurofibromatosis-2. © 2000 Academic Press.