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Rapid movements at segment boundaries.

Malin Svensson Lundmark1

  • 1Centre for Languages and Literature, Lund University, Lund, Sweden.

The Journal of the Acoustical Society of America
|March 31, 2023
PubMed
Summary
This summary is machine-generated.

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Acoustic segment boundaries in speech are linked to the movements of articulators, with crucial articulator acceleration peaks strongly correlating with consonant and vowel durations.

Area of Science:

  • Phonetics and Speech Science
  • Articulatory Phonology
  • Acoustic Phonetics

Background:

  • The relationship between articulatory movements and acoustic speech output is complex.
  • Acoustic segment boundaries are thought to be influenced by the dynamics of speech production.
  • Understanding this link is crucial for speech synthesis and recognition.

Purpose of the Study:

  • To investigate the one-to-one relationship between articulatory movements and acoustic segment boundaries.
  • To determine if acceleration peaks in articulator movement correlate with acoustic segment boundaries.
  • To measure time lags between articulatory events and acoustic boundaries.

Main Methods:

  • Comparing consonant and vowel segment durations with articulatory posture intervals derived from acceleration peaks.

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  • Measuring time lags between acoustic segment boundaries and acceleration peaks.
  • Analyzing correlations between specific articulator movements (lips, tongue tip) and speech segments ([m], [n]).

    • Main Results:

    • Lip posture intervals strongly correlated with [m] segments; tongue tip postures strongly correlated with [n] segments.
    • Acoustic boundaries were found to precede acceleration peaks, with short time lags for crucial articulators.
    • Vowel segments showed strong correlation with consonantal articulators but weaker correlation with tongue body movements.

    Conclusions:

    • The acceleration of crucial articulators directly influences both consonant and vowel segment durations.
    • Articulatory dynamics, specifically acceleration peaks, provide measurable correlates for acoustic speech boundaries.
    • Speech production involves coordinated movements where consonantal articulator acceleration impacts surrounding vowel sounds.