4pSCb3. Congruence of articulatory and acoustic variability.
Session: Thursday Afternoon, June 19
Author: Alice Faber Location: Haskins Labs., 270 Crown St., New Haven, CT 06511 Author: Julie M. Brown Location: Univ. of Connecticu
Johnson et al. [J. Acoust. Soc. Am. 94, 701--714 (1993)] suggest, on the
basis of observed inter-speaker variability in discriminant analyses of
articulatory measures, that speakers utilize acoustically defined targets in
speech production. The present paper compares inter-speaker variability in
simultaneously recorded acoustic and articulatory data (st words) from
five New England speakers. The articulatory data were x and y coordinates of
coils on the tongue, lips, and jaw, transduced by the Haskins Laboratories EMMA
system and recorded at three locations in the target vowel; acoustic data were
F1, F2, and F3 measures at the same temporal locations. Discriminant analyses of
the articulatory and acoustic data sets reveal congruent patterns of
inter-speaker variability in the two domains. The inter-speaker differences do
not reflect superficial dialect or idiolect differences (e.g., extent to which
/(open aye)/ and /(open oh)/ contrast, or tendency to glottalize syllable-final
/t/). Rather, they reflect differences in the way subjects vary jaw position,
especially height, suggesting an anatomical basis for the observed differences.
Thus, within the limits of their oral morphology, these speakers are using
comparable articulatory targets for speech sounds.