Issue N# 1 - 2009
PHONIATRICS
Formant structures of vowels produced in stutterers’ speech in normal and fast speech rates
Authors : Hirsch F, Monfrais-Pfauwadel M. C, Sock R, Vaxelaire B. (Strasbourg, Paris)
Ref. : Rev Laryngol Otol Rhinol. 2009;130,1:17-22.
Article published in french 
Downloadable PDF document french
Summary :
Objective: The aim of this study is to analyse the steady—state portion of the first two formants (F1 and F2) in the production of [CVp] sequences, containing vowels [i, a, u] pronounced in two speech rates (normal and fast), by groups of untreated and treated stutterers, and control subjects. Material and method: We recorded 15 speakers (5 control speakers, 5 non-treated stutterers and 5 treated stutterers) who had to repeat sentences containing [CV] sequences ten times, in normal and fast speech rates, where [C] was [p], [t] or [k] and [V], [i], [a] or [u]. Results: Comparing data between the three groups of speakers, a vowel space reduction is observed for stutterers at a normal speaking rate, compared with control speakers and treated stutterers. When speech rate increases, no reduction of vowel space is noticeable for non-treated stutterers, contrary to treated stutterers and controls. Conclusion: Results for stutterers could be interpreted in terms of lack of articulatory flexibility.
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