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Speech adaptation to palatal perturbation:Evidence for sensorimotor reorganization across the workspace

Authors :
Shiller, Douglas M
Barbier, Guillaume
Ménard, Lucie
Baum, Shari
Barbier, Guillaume
Université de Montréal (UdeM)
Centre for Research on Brain, Language and Music (CRBLM)
McGill University = Université McGill [Montréal, Canada]
Laboratoire de Phonétique
Laboratoire de Phonétique [Montréal]
Université du Québec à Montréal = University of Québec in Montréal (UQAM)-Université du Québec à Montréal = University of Québec in Montréal (UQAM)
School of Communication Sciences and Disorders
Source :
Acoustical Society of America 176th Meeting, Acoustical Society of America 176th Meeting, Nov 2018, Victoria, Canada
Publication Year :
2018
Publisher :
HAL CCSD, 2018.

Abstract

International audience; Competent speakers demonstrate a high degree of precision in speech production, but also considerable plasticity in speech motor patterns in the attainment of speech goals. This plasticity is evident through adaptation to sensory perturbations, including physical manipulations that alter both auditory and somatosensory feedbacks. One such manipulation involves a palatal prosthesis, impacting in particular the production of fricatives such as /s/. Adaptation to such a perturbation is evident in the acoustic signal, however the underlying kinematic changes remain unclear. Here, we explored speech adaptation to a palatal prosthesis in 9 adult speakers by measuring tongue kinematics using electromagnetic articulography, in addition to acoustic measures, during the production of various vowel-consonant-vowel sequences. Acoustic analyses showed evidence of the perturbation, along with compensatory changes following 20 minutes of speech practice. Interestingly, effects were also observed in the vowels. Analysis of tongue kinematics confirmed the global nature of the effects, showing significant changes in the articulation of vowels and consonants. Furthermore, directional analyses indicate a degree of fine-tuning in motor adaptation. The findings indicate that even localized changes in palate shape induce complex compensatory changes across the articulatory workspace. The results are discussed in the context of current models of speech motor control.

Details

Language :
English
Database :
OpenAIRE
Journal :
Acoustical Society of America 176th Meeting, Acoustical Society of America 176th Meeting, Nov 2018, Victoria, Canada
Accession number :
edsair.dedup.wf.001..0b526923b4800327e9ba3904c1402e4c