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Vowel coarticulation: Landmark statistics measure vowel aggression.

Wei-rong Chen1, Yueh-chin Chang1, Khalil Iskarous2

  • 1Graduate Institute of Linguistics, National Tsing Hua University, No. 101 Sec. 2 Guangfu Road, Hsinchu 30013, Taiwan.

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Summary

This study quantifies vowel coarticulation in Taiwan Mandarin using articulatory data. Vowel /i/ showed the most tongue body information sharing with preceding consonants, while lip articulator sharing followed the order /u/ > /i/ > /a/.

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Area of Science:

  • Phonetics
  • Speech Science
  • Linguistics

Background:

  • Previous research used regression analysis and mutual information to study consonant coarticulation.
  • These methods quantified consonant place invariance and coarticulatory resistance.

Purpose of the Study:

  • To apply regression analysis and mutual information to measure vowel coarticulatory properties.
  • To investigate the coarticulatory behavior of vowels in Taiwan Mandarin CV syllables.

Main Methods:

  • Utilized articulatory data from seven Taiwan Mandarin speakers producing CV syllables.
  • Employed regression analysis and mutual information to assess information sharing between consonants and vowels.

Main Results:

  • Vowel /i/ exhibited the highest information sharing with the preceding consonant concerning the tongue body.
  • For the lip articulator, information sharing followed the order: /u/ > /i/ > /a/.
  • Vowels /a/ and /u/ did not show significant differences in tongue body information sharing.

Conclusions:

  • Vowel landmark statistics may reflect vowel "aggression" in speech production.
  • The Vowel-to-Consonant (V-to-C) effect appears dominant over the Consonant-to-Vowel (C-to-V) effect in CV coarticulation.