ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06

4aSC22. An acoustic and articulatory study of anticipatory labial coarticulation.

Marios Fourakis

Ying Xu

Dept. of Speech and Hear. Sci., Ohio State Univ., 110 Pressey Hall, 1070 Carmack Rd., Columbus, OH 43210

The acoustic and articulatory aspects of anticipatory labial coarticulation were examined. One female native speaker of American English read a list containing ten repetitions of nonsense V1CV2 sequences where V1 was always [i], C was one of [s], [(sh)], [z], [(yog)], and V2 was one of [i], [u], or [a]. The movement of upper and lower lip and jaw were recorded using the strain gauge apparatus developed by Barlow and colleagues, and the acoustic signal was also recorded. Short term spectra were taken of the fricative noise at the beginning and at intervals spaced at 0.25, 0.50, and 0.75 of the duration of the fricative. Two spectral peaks were identified at each point. It was predicted that the frequencies of those peaks would be affected by the nature of the following vowel and that the coarse spectral track would show a downward movement when the following vowel was [u]. Neither of these predictions obtained. This result is in agreement with the EMG data of Gelfer et al. [ 2443--2445 (1989)] but not with the acoustic data of, among others. Sereno et al. [ 512--519 (1987)]. Results from a second speaker and from the analysis of the lip movement data will also be presented.