2009, English, Article edition: Motor equivalent strategies in the production of /u/ in perturbed speech Brunner, Jana; Hoole, Phil; Perrier, Pascal

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Physical Description
  • text
Published
  • HAL - CCSD
  • 2009
Language
  • English

Edition details

Title
  • Motor equivalent strategies in the production of /​u/​ in perturbed speech
Author
  • Brunner, Jana
  • Hoole, Phil
  • Perrier, Pascal
Published
  • HAL - CCSD
  • 2009
Physical Description
  • text
Subjects
Notes
  • Several articulatory strategies are available during the production of /​u/​, all resulting in a similar acoustic output. /​u/​ has two main constrictions, at the velum and at the lips. A perturbation of either constriction can be compensated at the other one, e.g wider constriction at the velum by more lip protrusion, wider lip opening by more tongue retraction. This study investigates whether speakers use this relation under perturbation. Six speakers were provided with palatal prostheses which were worn for two weeks. Speakers were instructed to make a serious attempt to produce normal speech. Their speech was recorded via EMA and acoustics several times over the adaptation period. Formant values of /​u/​-productions were measured. Velar constriction width and lip protrusion were estimated. For four speakers a correlation between constriction width and lip protrusion was found. A negative correlation between lip protrusion and F1 or F2 could sometimes be observed, but no correlation occurred between constriction size and either of the formants. The results show that under perturbation speakers use motor equivalent strategies in order to adapt. The correlation between constriction size and lip protrusion is stronger than in studies investigat- ing unperturbed speech. This could be because under perturbation speakers are inclined to try out several strategies in order to reach the acoustic target and the co-variability might thus be greater.
  • HAL:hal-00372712, version 1
  • HAL:http:/​/​hal.archives-ouvertes.fr/​hal-00372712/​en/​
Language
  • English
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