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Poster De Conférence Année : 2022

Consonant production in children with cochlear implants and exposed to Canadian French Cued Speech: an acoustic and articulatory study

Résumé

Although cochlear implant improves deaf children’s speech intelligibility (Turgeon et al., 2017; Grandon et al., 2020), the auditory information it provides remains degraded (Colin et al., 2017). This auditory limitation can impact on oral language development and lead to persistent language disorders (Geers et al., 2015). Several acoustic studies have highlighted specific impairments in the speech production of children with CI (Grandon, 2016; Reidy et al., 2017) but only a few studies have examined how children with CI use their articulators to produce speech (Turgeon et al., 2017). To supplement degraded acoustic information, cued speech manual gestures can be used in conjunction with auditory and visual speech (Hage & Leybaert, 2006). French Cued Speech has been shown to improve auditory processing of sentences in children with hearing aids (Périer et al., 1990, Leybaert et al., 2010) and to help children build more stable phonological representations (Charlier & Leybaert, 2000), even in children with CI (Hage & Leybaert, 2006; Leybaert et al., 2010). It has also been suggested that exposure to French Cued Speech could improve production (Hage & Leybaert, 2006; Machart et al., 2019). The aim of the present study is to examine the influence of Canadian French Cued Speech proficiency on the acoustic quality and accuracy of tongue gestures in children with CI. Based on speech production data obtained in French-speaking children with CI (Machart et al., 2019; in revision), we chose to focus on the two following stops /t/, /k/ and the two fricatives /s/, /ʃ/, for which substitution errors are common. Articulatory data were obtained using an ultrasound system (described in Ménard et al., 2014). The consonants were recorded during the production of simple words (Picture-naming task), each including one of the target consonants followed by the vowel /a/. Two groups of children were examined: 10 typical children with normal hearing (NH) and 9 children with cochlear implants who showed different cued speech proficiency levels (CI- and CI+). Acoustic data were phonetically annotated and analysed using PRAAT (Boersma & Weenink). Accuracy scores have been computed. Acoustic measurements such as formant transition for stops and spectral moments for fricatives have been obtained. Articulatory data have been extracted using SLURP (Laporte & Ménard, 2018). Tongue contour were assessed on horizontal positions of specific flesh points (Ménard et al., 2013; Ohkubo & Scobbie, 2019) as well as on MCI (Dawson et al., 2015). The results suggest that cued speech proficiency sustains the development of speech production in children with cochlear implants, and improves their articulatory gestures, particularly for the place contrast in plosives as well as fricatives. Moreover, it appears that high cued speech proficiency may allow children with CI to produce acoustic and articulatory contrasts in the same way as children with normal hearing.
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hal-04273490 , version 1 (07-11-2023)

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  • HAL Id : hal-04273490 , version 1

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Laura Machart, Anne Vilain, Hélène Loevenbruck, Lucie Ménard. Consonant production in children with cochlear implants and exposed to Canadian French Cued Speech: an acoustic and articulatory study. 8th International Conference on Speech Motor Control (SMC), Aug 2022, Groningen, Netherlands. ⟨hal-04273490⟩
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