Graeme Clark Collection

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Author: Cowan, Robert × Author: Dowell, Richard × End date: 1999 × Start date: 1990 × Type: Journal Article × Subject: cochlear implants × Subject: speech processing ×

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    Continuing improvements in speech processing for adult cochlear implant patients
    Hollow, R. D. ; Dowell, R. C. ; Cowan, R. S. C. ; Skok, M. C. ; Pyman, B. C. ; Clark, Graeme M. ( 1995)
    The Cochlear 22-channel cochlear implant has employed a succession of improved speech-processing strategies since its first use in an adult patient in Melbourne in 1982. 1 The first patients received the F0F2 coding strategy developed by the University of Melbourne, in the Wearable Speech Processor (WSP). The F0F2 coding scheme presented the implant user with three acoustic features of speech. These were 1) the amplitude of the waveform, presented as the amount of current charge, 2) fundamental frequency (F0) or voice pitch, presented as rate of biphasic pulsatile stimulation, and 3) the spectral range of the second formant frequency (F2), which was represented by varying the site of stimulation along the electrode array.