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Updated: May 5, 2026

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Segmental and prosodic effects on intervocalic voiced stop reduction in connected speech.

Dominique Bouavichith1, Lisa Davidson

  • 1New York University, New York, N.Y., USA.

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Summary

American English speakers reduce intervocalic voiced stops to approximants, not fricatives. Syllable stress significantly impacts this reduction, with preceding stress promoting weakening and following stress enhancing stop consonant realization.

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Area of Science:

  • Phonetics and Phonology
  • Sociolinguistics
  • Acoustic Analysis

Background:

  • Phonological lenition theories often link connected speech reductions to phonetic processes.
  • Previous research has not fully clarified the relationship between phonetic reduction and phonological lenition stages.

Purpose of the Study:

  • To investigate the phonetic realization of intervocalic voiced stops in American English reading.
  • To determine if connected speech reduction processes align with proposed phonological lenition stages.

Main Methods:

  • Analysis of intervocalic voiced stop production in American English speakers during reading tasks.
  • Acoustic analysis of consonant production, focusing on reduction patterns and stress effects.

Main Results:

  • American English speakers produce approximants, not fricatives or [h]/glottal stop, during reduction.
  • Consonant reduction is significantly influenced by syllable stress: 51% reduction with preceding stress vs. 7% with following stress.
  • Acoustic properties (duration, intensity) differ based on stress placement, with enhanced stop cues when stress follows.

Conclusions:

  • Phonetic reduction of intervocalic voiced stops in American English results in approximants.
  • Syllable stress is a critical factor, overriding reduction tendencies when stress follows the consonant.
  • Speakers prioritize acoustic cues for stress, including robust consonant production, over intervocalic reduction pressures.