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The perception of speech gestures

A M Surprenant1, L Goldstein

  • 1Department of Psychological Sciences, Purdue University, West Lafayette, Indiana 47907-1364, USA. aimee@psych.purdue.edu

The Journal of the Acoustical Society of America
|July 22, 1998
PubMed
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Temporal overlap in speech gestures, particularly stop consonant clusters, significantly impacts perception. Listeners struggle to detect consonants when speech gestures overlap extensively, affecting intelligibility.

Area of Science:

  • Phonetics
  • Speech Perception
  • Articulatory Phonology

Background:

  • Temporal overlap in speech gestures can obscure acoustic cues.
  • Understanding how gestural overlap affects consonant perception is crucial for speech production models.

Purpose of the Study:

  • To investigate the impact of temporal overlap in speech gestures on the perception of stop consonant clusters.
  • To determine if specific gestural patterns and their overlap influence consonant detectability.

Main Methods:

  • X-ray microbeam data was used to obtain speech gesture sequences with varying temporal overlap.
  • A consonant monitoring task was employed with stimuli of stop sequences and single stops.
  • Experiment 2 manipulated acoustic release information to assess its contribution to perception.

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Main Results:

  • Consonants in overlapping sequences were detected less often than single consonants.
  • Bilabial gestures obscured preceding alveolar gestures more than vice versa.
  • Acoustic release information generally improved consonant detectability, but not for initial alveolar stops in sequences.

Conclusions:

  • English speakers' gestural patterns with significant overlap may not be fully recoverable by listeners.
  • The degree of gestural overlap, particularly between lip and tongue gestures, correlates with reduced consonant perception.
  • Specific metric properties of gestural patterns can be linked to their perceptual recoverability.