Аннотация:The purpose of this study was to develop a quantitative description of the temporal characteristics of repeated utterances. Movements of the lower lip, jaw and tongue tip were obtained during the production of /dɑb/, /pɑt/, /ɑb/, /bɑ/, /ib/, and /bi/ with strain gauge and cineradiographic techniques. Four subjects repeated each syllable in synchrony with clicks presented at 2.5, 3.0, 3.5, 4.0, and 4.5 Hz. A second condition using a 10-mm bite block was also employed to compare with jaw-free productions. Additionally, cycle duration was defined as the period of time between successive opening movements. Each movement cycle was divided into four components: opening movement, open posture, closing movement, and closed posture. A multivariate regression design was used to show that as cycle duration varied there were temporal interactions between open and closed postures, and between opening and closing movements. Specifically, regression coefficients of open and closed postures demonstrated reciprocal relations as a function of cycle duration. Similiar results were found for the bite-block condition. Data will be discussed with respect to models of speech production. [Work supported by NINCDS and NIDR.]
