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PubMed · 12486315

The trough effect: implications for speech motor programming.

Björn Lindblom·Harvey M Sussman·Golnaz Modarresi·Elizabeth Burlingame
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Abstract

While the existence of the trough effect is unquestioned, its theoretical significance is unknown. A multifaceted instrumental approach - spectrographic, cineradiographic, and vocal tract modeling - was used to document the trough effect in open (V.CV) and closed (VC.V) syllable forms using a symmetrical vowel context surrounding labial stops. Collectively, the results document the trough phenomenon as a momentary deactivation of tongue and/or lip movement after V1 and continuing into the stop closure. This empirical event suggests a segment-by-segment activation pattern as opposed to a diphthongal vowel-to-vowel trajectory with an independent and superimposed consonantal gesture. Quantitative models of VCV coarticulation must incorporate the trough effect in order to more effectively capture the kinematic properties of speech.

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HumansLipMovementPhoneticsSound SpectrographySpeechSpeech AcousticsSpeech Production MeasurementTongueJournal ArticleResearch Support, U.S. Gov't, P.H.S.

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Björn Lindblom, Harvey M Sussman, Golnaz Modarresi, Elizabeth Burlingame. The trough effect: implications for speech motor programming.. https://doi.org/10.1159/000068349

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