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A comparison of vowel productions in prelingually deaf children using cochlear implants, severe hearing-impaired children using conventional hearing aids and normal-hearing children

A comparison of vowel productions in prelingually deaf children using cochlear implants, severe hearing-impaired children using conventional hearing aids and normal-hearing children

Folia Phoniatrica et Logopaedica 63(3): 154-160

The purpose of this study was to compare vowel productions by deaf cochlear implant (CI) children, hearing-impaired hearing aid (HA) children and normal-hearing (NH) children. 73 children [mean age: 9;14 years (years;months)] participated: 40 deaf CI children, 34 moderately to profoundly hearing-impaired HA children and 42 NH children. For the 3 corner vowels [a], [i] and [u], F(1), F(2) and the intrasubject SD were measured using the Praat software. Spectral separation between these vowel formants and vowel space were calculated. The significant effects in the CI group all pertain to a higher intrasubject variability in formant values, whereas the significant effects in the HA group all pertain to lower formant values. Both hearing-impaired subgroups showed a tendency toward greater intervowel distances and vowel space. Several subtle deviations in the vowel production of deaf CI children and hearing-impaired HA children could be established, using a well-defined acoustic analysis. CI children as well as HA children in this study tended to overarticulate, which hypothetically can be explained by a lack of auditory feedback and an attempt to compensate it by proprioceptive feedback during articulatory maneuvers.

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Accession: 051114346

Download citation: RISBibTeXText

PMID: 20938196

DOI: 10.1159/000318879

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