Graeme Clark Collection

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1983 - 1989 1 1990 - 1997 4
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Author: Seligman, Peter × End date: 1999 × Subject: otolaryngology × Subject: otology ×

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Now showing 1 - 5 of 5
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    Engineering
    Patrick, James F. ; Seligman, Peter M. ; Clark, Graeme M. (Singular Publishing, 1997)
    The last two decades have seen major advances in cochlear implants for profoundly deaf people. Implants are now used by severely to profoundly deaf adults and children in almost every phase of daily life. They have become an established treatment, and today's expectations for all aspects of the cochlear implant system are much greater than they were for the experimental devices of the early 1980s. Hardware designs have improved to meet clinical and research demands, technological developments have made the devices smaller and more reliable, and speech processing research has yielded a series of improvements in patient benefit.
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    Comparison of current speech coding strategies
    Whitford, L. A. ; Seligman, P. M. ; Blamey, Peter J. ; McDermott, H. J. ; Patrick, J. F. ( 1993)
    This paper reports on two studies carried out at the University of Melbourne jointly with Cochlear Pty Ltd. The studies demonstrated substantial speech perception improvements over the current Multipeak strategy in background noise.
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    Initial results for six patients with a multiple-channel cochlear prosthesis
    Dowell, R. C. ; Brown, A. M. ; Seligman, P. M. ; Clark, Graeme M. (Monash University Press, 1983)
    A total of eight patients have been assessed with the multi-channel cochlear prosthesis at the University of Melbourne. The first two patients were implanted with a prototype device in 1978 and 1979, and their results with various speech evaluation procedures have been reported and summarized in detail elsewhere (Clark & Tong, 1982). Briefly, these results indicated that some very significant benefit could be obtained for these patients when using the cochlear prosthesis with external speech processing, particularly when using the device in conjunction with lipreading. It was also shown that some significant understanding of speech was possible without lipreading (open-set) for both patients, although this was fairly limited.
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    Cochlear implants: high rate stimulation studies and the effect of electrode position [Abstract]
    Shepherd, R. K. ; Huang, C. Q. ; Xu, J. ; Tykocinski, M. ; Seligman, P. M. ; Clark, Graeme M. ( 1996)
    This paper summarizes our recent findings investigating the safety of high rate electrical stimulation, and reviews the effects of electrode position on auditory excitability. These studies used charge balanced biphasic pulses and electrode shorting between stimuli to minimize any residual charge or direct current. High rate (400-1000 pulses/s) electrical stimulation of the auditory nerve can result in significant stimulus induced reductions in auditory nerve excitability at stimulus levels well above those used clinically (1). The extent of this reduction was dependent on stimulus rate, intensity and duty cycle, implying that such changes were related to the degree of evoked activity.
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    Speech perception results for children changing from multipeak to SPEAK speech processing strategy [Abstract]
    Sarant, J.Z. ; DelDot, J. ; Dettman, S. ; Hollow, R. ; Skok, M. ; Seligman, P.M. ; Dowell, R.C. ; Gibson, W.P.R. ; Clark, Graeme M. ; Cowan, R. S. C. ; Pyman, B. ; Galvin, K. L. ; Shaw, S. ; Barker, E. J. ; Brown, C. ( 1996)
    In mid-1994, a new speech processing strategy termed SPEAK was introduced for the Nucleus Spectra-22 cochlear prostheses. To compare benefits in implanted children changing to the SPEAK strategy, speech perception in a group of twelve children from Melbourne and Sydney was evaluated. The children were assessed in quiet and in background noise.