Abstract
Fundamental frequency contours for several simple declarative sentences were estimated using a computer-simulated pitch extractor. Measurements were obtained for three American male speakers repeating each of three sentences three times. The speakers were instructed as to which syllables should be emphasized in each sentence. The purpose of the experiment was to determine which aspects of the fundamental frequency contour reflect vowel stress and which aspects reflect characteristics of individual speakers. The stressed vowel regions of the fundamental frequency contours were found to be easily identifiable across speakers and replications. In addition, the variability of the contours during unstressed regions appeared to be greater than that for the stressed vowel regions. This result suggests that in modeling fundamental frequency contours greater weight should be attached to deviations between observed and predicted values in the stressed vowel regions.
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