Abstract
It has been known for some time that jaw movement during speech includes both translation and rotation [C. H. Gibbs and T. Messerman, ASHA Rep. No. 7 (1972)]. However, present models of articulation treat jaw movement either as pure rotation [P. Mermelstein, J. Acoust. Soc. Am. 53 (1973)] or as pure vertical translation [Y. Kakita and O. Fujimura, J. Acoust. Soc. Am. Suppl. 1 62, S15 (1977)], primarily because the data needed for a more accurate model have not been available. In this experiment, the jaw movement of three subjects, recorded during the production of VCV disyllables, was separated into rotation and translation, using an anatomically based model. We analyzed the relationship between these two components as a function of changes in the segmental and the suprasegmental context. Preliminary results for two subjects suggest that the additional degree of freedom of jaw movement is related to vowel front/back characteristics. [Work supported by NINCDS grant NS‐13617 to Haskins Laboratories.]
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