Graeme Clark Collection

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    A speech processing strategy for multiple-electrode cochlear implant prostheses
    Tong, Y. C. ; Clark, Graeme M. (Monash University Press, 1983)
    Speech studies in a number of research centres have shown that useful speech information could be presented to deaf patients using single or multiple electrode cochlear implant prostheses (Parking & Anderson, 1983). In our laboratory, speech processing strategies were formulated on the basis of psychophysical results. This paper examines the psychophysical characteristics of the hearing sensations produced by electrical stimulation using scala tympani electrodes in postlingually deaf patients; a speech processing strategy is then discussed on the basis of these characteristics.
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    A multiple-channel cochlear implant: a summary of results for two patients
    Clark, Graeme M. ; Tong, Yit Chow ( 1982)
    This report summarizes the results of the psychophysical and speech studies conducted on two patients with multiple-channel cochlear implants over an 18 month period at the University of Melbourne. The psychophysical results indicated that a suitable speech-processing strategy would be to convert the second formant frequency of speech to electrode position, the voicing frequency to pulse rate of electrical stimulation, and the acoustic intensity to current level. An evaluation of this strategy by means of a laboratory-based speech processor showed encouraging results, and a wearable speech processor was subsequently developed so that the patients could be benefited in their everyday life.
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    Electrical stimulation of the human cochlea: psychophysical and speech studies
    Clark, Graeme M. (Plenum Publishing Corporation, 1981)
    This report describes psychophysical and speech studies conducted on two of our post-lingually deaf patients implanted with the nature of the hearing sensations produced by the individual electrodes, and to investigate the feasibility of the transmission of speech information to higher centres by means of cadences of stimulation using on electrode at a time. Two totally deaf patients (MC1 and MC2) participated in these studies.