Graeme Clark Collection

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http://hdl.handle.net/11343/375

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Author: Blamey, Peter × Author: Clark, Graeme × Author: Sarant, Julia × End date: 1999 × Type: Conference Paper × Subject: otolaryngology ×

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    Speech perception and spoken language in children with impaired hearing
    Clark, Graeme M. ; Wright, M. ; Tooher, T. ; Psarron, C. ; Godwin, G. ; Rennie, M. ; Meskin, T. ; Blamey, P. ; Sarant, J. ; Serry, T. ; Wales, R. ; James, C. ; Barry, J. ( 1998)
    Fifty seven children with impaired hearing aged 4-12 years were evaluated with speech perception and language measures as the first stage of a longitudinal study. The Clinical Evaluation of Language Fundamentals (CELF) and Peabody Picture Vocabulary Test (PPVT) were used to evaluate the children's spoken language. Regression analyses indicated that scores on both tests were significantly correlated with chronological age, but delayed relative to children with normal hearing. Performance increased at 45% of the rate expected for children with normal hearing for the CELF, and 62% for the PPVT. Perception scores were not significantly correlated with chronological age, but were highly correlated with results on the PPVT and CELF. The data suggest a complex relationship whereby hearing impairment reduces speech perception, which slows language development, which has a further adverse effect on speech perception.
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    The effect of language knowledge on speech perception in children with impaired hearing
    Sarant, J. Z. ; Blamey, P. J. ; Clark, Graeme M. ( 1996)
    Open-set words and sentences were used to assess auditory speech perception of three hearing-impaired children aged 9 to 15 years using the Nucleus 22channel cochlear implant. Vocabulary and syntax used in the tests were assessed following the initial perception tests. Remediation was given in specific vocabulary and syntactic areas, chosen separately for each child, and the children were reassessed. Two children showed a significant post-remediation improvement in their overall scores on the syntactic test and both perception measures. The third child who was older, had the best language knowledge and the lowest auditory speech perception scores, showed no significant change on any of the measures. Language remediation in specific areas of weakness may be the quickest way to enhance speech perception for some children with impaired hearing in this age range.
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    Speech processing strategies in an electrotactile aid for hearing-impaired adults and children
    Cowan, Robert S. C. ; Blamey, Peter J. ; Sarant, Julia Z. ; Galvin, Karyn L. ; Clark, Graeme M. (Australian Speech Science and Technology Association, 1990)
    An electrotactile speech processor (Tickle Talker) for hearing-impaired children and adults has been developed and tested. Estimates of second format frequency, fundamental frequency and speech amplitude are extracted from the speech input, electrically encoded and presented to the user through eight electrodes located over the digital nerve bundles on the fingers of the non-dominant hand. Clinical results with children and adults confirm that tactually-encoded speech features can be recognized, and combined with input from vision or residual audition to improve recognition of words in isolation or in sentences. Psychophysical testing suggests that alternative encoding strategies using multiple-electrode stimuli are feasible. Preliminary results comparing encoding of consonant voiced/voiceless contrasts with new encoding schemes are discussed.