Interarticular phasing as an index of temporal regularity in speech.

Number 368
Year 1982
Drawer 7
Entry Date 06/15/1999
Authors Tuller, B., Kelso, J. A. S., & Harris, K.
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Publication Journal of Experimental Psychology: Human Perception and Performance, 8, 460-472
url http://www.haskins.yale.edu/Reprints/HL0368.pdf
Abstract In this article we examine the effects of suprasegmental variations in speaking rate and syllable stress on temporal organization at the articulator level. Specifically, we wished to determine what articulatory constancies (if any) underlie the preservation of phonetic identify when syllable stress and speaking rate are varied. Electromyographic activity was sampled from five muscles known to be associated with lip, tongue, and jaw movements during selected bisyllabic utterances. Large variations were observed in magnitude and duration of activity in individual muscles. However, analysis of the phase relations among muscles suggested that the timing of consonant-related muscle activity remains fixed relative to activity for the flanking vowels. We argue that this style of coordination, in which the relative timing of activity among muscles in preserved across metrical changes, is not only characteristic of man nonspeech motor activities but may also rationalize certain findings in speech perception.
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