Graeme Clark Collection

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Type: Book Chapter × Author: Clark, Graeme × Subject: cochlear implant × Subject: speech processing ×

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    Cochlear implants
    Clark, Graeme M. (Springer, 2003)
    Over the past two decades there has been remarkable progress in the clinical treatment of profound hearing loss for individuals unable to derive significant benefit from hearing aids. Now many individuals who were unable to communicate effectively prior to receiving a cochlear implant are able to do so, even over the telephone without any supplementary visual cues from lip reading. The earliest cochlear implant devices used only a single active channel for transmitting acoustic information to the auditory system and were not very effective in providing the sort of spectrotemporal information required for spoken communication. This situation began to change about 20 years ago upon introduction of implant devices with several active stimulation sites. The addition of these extra channels of information has revolutionized the treatment of the profoundly hearing impaired. Many individuals with such implants are capable of nearly normal spoken communication, whereas 20 years ago the prognosis for such persons would have been extremely bleak. (From Introduction)
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    Speech processing for cochlear implants
    Tong, Y. C. ; Millar, J. B. ; Blamey, P. J. ; Clark, Graeme M. ; Dowell, R. C. ; Patrick, J. F. ; Seligman, P. M. (JAI Press Ltd, 1992)
    The cochlear implant is a hearing prosthesis designed to replace the function of the ear. The operation of the prosthesis can be described as a sequence of four functions: the processing of the acoustic signal received by a microphone; the transfer of the processed signal through the skin; the creation of neural activity in the auditory nerve; and the integration of the experience of this neural activity into the perceptual and cognitive processing of the implantee.