Graeme Clark Collection

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Author: Clark, Graeme × End date: 1994 × Start date: 1994 × Type: Conference Item × Subject: cochlear implant ×

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    "Cochlear View" and its application in cochlear implant patients [Abstract]
    Xu, J. ; Xu, S. A. ; Clark, Graeme M. ; Marsh, M. A. ( 1994)
    Recent advances in multichannel intracochlear implantation have generated interests in correlating individual stimulating electrodes to pitch perception. An appropriate radiographic technique is required to precisely document the location of the implanted intracochlear electrode array. Anatomical studies, including the measurements of the temporal bone using high-resolution CT films and 3D reconstruction from the petrous bone sections, were conducted to define the spatial position of cochlea in the skull. Thus, a "Cochlear View" was designed and introduced for postoperative radiological evaluation of multichannel intracochlear implantation. In this paper, a detailed radiographic method and radiological interpretation of the "Cochlear View" are described. A plain radiograph of the "Cochlear View" was taken of 120 patients who had received the Nucleus multichannel implant. Studies have shown that a plain radiograph of the "Cochlear View" provides sufficient information to correctly evaluate the results of implantation, including the insertion depth and position of individual electrodes. It plays an important role in guiding the management of frequency mapping and acts as a useful reference for further research purposes.
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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.