Development of Oronasal
Coupling in Typically Developing
Children and Children with Speech Delay
Delayed acquisition of modulation of oronasal coupling may contribute to the overall impression of speech delay of unknown origin. Of particular interest in the current investigation was the intrasyllabic timing of oronasal coupling relative to other speech articulators. Production of words containing oral and nasal consonants was observed in typically developing children, children with speech delay (3-to-5 years of age), and adults. Modulation of nasal vibration, obtained using an accelerometer, was compared with mandibular kinematics, which were transduced using a video-based movement tracking system. The temporal phasing of events is discussed with respect to interarticulatory coordination.