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Vowel normalization for accent: an investigation of best exemplar locations in northern and southern British English

Bronwen G Evans1, Paul Iverson

  • 1Department of Phonetics and Linguistics, University College London, 4 Stephenson Way, London NW1 2HE, United Kingdom. bron@phon.ucl.ac.uk

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Summary

Listeners adapt their vowel perception to match different British English accents. Individual language backgrounds influenced this accent-based perceptual normalization, linking production and perception in sociolinguistic contexts.

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Area of Science:

  • Phonetics and Phonology
  • Sociolinguistics
  • Auditory Perception

Background:

  • Listeners often encounter diverse regional accents in spoken language.
  • Understanding accent influence on speech perception is crucial for communication.
  • Vowel production varies across different English dialects.

Purpose of the Study:

  • To investigate if listeners adjust vowel categorization based on accent.
  • To examine the role of individual language background in accent adaptation.
  • To explore the link between perceptual normalization and sociolinguistic production changes.

Main Methods:

  • Two experiments using synthesized vowels in carrier sentences.
  • Listeners provided goodness ratings for vowels in northern and southern English accents.
  • A computer algorithm iteratively adjusted vowel features (F1, F2, F3, duration) based on ratings.

Main Results:

  • Most listeners perceptually normalized vowels according to the carrier sentence accent.
  • Individual language background (regional upbringing) affected normalization patterns.
  • Perceptual adjustments correlated with known sociolinguistic production variations.

Conclusions:

  • Listeners dynamically adjust vowel categorization to accommodate different accents.
  • Accent-based perceptual normalization is influenced by personal linguistic history.
  • Findings highlight the interplay between language production, perception, and sociolinguistic factors.