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Related Experiment Video

Updated: May 9, 2026

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
09:09

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Published on: September 27, 2024

Perceptual compensation for differences in speaking style.

A Davi Vitela1, Natasha Warner, Andrew J Lotto

  • 1Speech, Language and Hearing Sciences, University of Arizona Tucson, AZ, USA.

Frontiers in Psychology
|July 13, 2013
PubMed
Summary
This summary is machine-generated.

Listeners adjust vowel perception based on preceding speech context. This study shows speaking style, not just talker differences, influences vowel categorization, revealing context-dependent speech perception.

Keywords:
auditory perceptioncontext effectsnatural speechreduced speechspeech perception

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Area of Science:

  • Phonetics and Phonology
  • Auditory Perception
  • Speech Communication

Background:

  • Listener vowel categorization is known to shift based on acoustic properties of preceding carrier phrases (CPs).
  • These shifts are often attributed to perceptual normalization for talker anatomical variability.
  • The role of speaking style variability within a single talker on vowel normalization remains less understood.

Purpose of the Study:

  • To investigate whether listeners normalize for acoustic variability introduced by different speaking styles (clear vs. reduced) within a single talker.
  • To determine if phrase context effects on vowel categorization persist when variability stems from speaking style rather than talker differences.

Main Methods:

  • Synthesized two vowel series varying between central and peripheral vowels (e.g., "beat"-"bit", "bod"-"bud").
  • Appended each synthesized vowel to carrier phrases spoken in either a "clear" or "reduced" speech style.
  • Participants categorized the target vowels presented in these eight distinct speaking style contexts.

Main Results:

  • A significant shift in vowel categorization was observed as a function of speaking style for three out of four carrier phrase sets.
  • This demonstrates that phrase context effects on vowel perception are achievable even with a single talker's varying speech styles.
  • The direction of these categorization shifts was not consistently predicted by the speaking style alone.

Conclusions:

  • Listeners exhibit perceptual normalization for speaking style variability within a single talker.
  • The observed context effects are influenced by an interaction between the carrier phrase's average spectrum and the target vowel.
  • This suggests a complex interplay between acoustic properties of the speech context and vowel perception, extending beyond talker-specific normalization.