Graeme Clark Collection

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Author: Sarant, Julia × End date: 1998 × Start date: 1992 × Subject: children × Subject: cochlear implant × Subject: speech processing ×

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    Speech perception in children using the advanced Speak speech-processing strategy
    Cowan, R. S. C. ; Brown, C. ; Whitford, L. A. ; Galvin, K. L. ; Sarant, J. Z. ; Barker, E. J. ; Shaw, S. ; King, A. ; Skok, M. ; Seligman, P. M. ; Dowell, R. C. ; Everingham, C. ; Gibson, W. P. R. ; Clark, Graeme M. ( 1995)
    The Speak speech-processing strategy, developed by the University of Melbourne and commercialized by Cochlear Pty Limited for use in the new Spectra 22 speech processor, has been shown to provide improved speech perception for adults in both quiet and noisy situations. The present study evaluated the ability of children experienced in the use of the Multipeak (Mpeak) speech-processing strategy (implemented in the Nucleus Minisystem-22 cochlear implant) to adapt to and benefit from the advanced Speak speech-processing strategy (implemented in the Nucleus Spectra 22 speech processor). Twelve children were assessed using Mpeak and Speak over a period of 8 months. All of the children had over 1 year's previous experience with Mpeak, and all were able to score significantly on open-set word and sentence tests using the cochlear implant alone. Children were assessed with both live-voice and recorded speech materials, including Consonant-Nucleus-Consonant monosyllabic words and Speech Intelligibility Test sentences. Assessments were made in both quiet and in noise. Assessments were made at 3-week intervals to investigate the ability of the children to adapt to the new speech-processing strategy. For most of the children, a significant advantage was evident when using the Speak strategy as compared with Mpeak. For 4 of the children, there was no decrement in speech perception scores immediately following fitting with Speak. Eight of the children showed a small (10% to 20%) decrement in speech perception scores for between 3 and 6 weeks following the changeover to Speak. After 24 weeks' experience with Speak, 11 of the children had shown a steady increase in speech perception scores, with final Speak scores higher than for Mpeak. Only 1 child showed a significant decrement in speech perception with Speak, which did not recover to original Mpeak levels.
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    Speech perception benefits for children using an advanced cochlear implant speech processing strategy in quiet and in noise [Abstract]
    Dettman, Shani J. ; Skok, Marissa ; Dowell, Richard C. ; Clark, Graeme M. ; Cowan, Robert S. C. ; Whitford, Lesley A. ; Sarant, Julia Z. ; Galvin, Karyn L. ; Barker, Elizabeth J. ; King, Alison ( 1994)
    A new speech processing strategy (SPEAK) has been developed by the University of Melbourne and Cochlear Pty Ltd for use with the Nucleus 22-channel electrode array. In this strategy, 20 programmable filters are repetitively scanned at an average rate of 250Hz and the largest spectral components or maxima are selected from the incoming speech signal. This new speech processing strategy has been shown to provide significantly improved benefits in adult implant patients, particularly in the presence of background noise. This report presents data of a preliminary paediatric clinical trial of the new SPEAK speech processing strategy.