Graeme Clark Collection

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1984 - 1987 3
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Type: Book Chapter × Author: Clark, Graeme × Start date: 1984 × End date: 1989 ×

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Now showing 1 - 3 of 3
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    Speech tracking: verfahrensweise und ergebnisse
    Mecklenburg, D. J. ; Dowell, R. C. ; Clark, Graeme M. (Springer-Verlag, 1987)
    Das Speech Tracking wurde im Jahre 1978 von De Filippo und Scott als Schulungs-und Untersuchungsverfahren fur Einzelpersonen eingefuhrt, die weitgehend oder vollstandig ertaubt waren. Bei diesem Verfahren werden dem Patienten Textpassagen von zwei bis zehn Wortern vorgelesen. Der Zuhorende, in diesem Fall der Cochlear Implant-Trager, versucht die betroffene Passage wortlich zu wiederholen. Versteht der Patient eines der Worter nicht, so wendet der Vorleser Verfahren an, die dem Zuhorenden weitere Informationen uber den Inhalt vermitteln. Nachdem jedes Wort korrekt wiederholt worden ist, wird eine weitere Passage vorgelesen, bis ein Prufungszeitraum von 10 Minuten abgeschlossen ist (Martin et al. 1981, 1985; Chouard et al. 1983; Tong et al. 1980; Mecklenburg et al. 1984; Rosen et al. 1980).
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    The engineering of future cochlear implants
    Clark, Graeme M. ; Tong, Yit. C. (Croom Helm, 1985)
    Speech is a complex acoustic signal, and information is transmitted to the brain at a rapid rate. For example during a conversation ten phonemes are uttered per second. Furthermore, these complex speech sounds are coded into patterns of neural discharges that enable the subject to understand speech. In order, therefore, to bring speech signals directly to residual auditory nerve fibres, considerable processing of the speech signal is required before the central nervous system will recognise and comprehend it. The magnitude of the task can be further appreciated when one considers that there are an average of 31,400 nerve fibres in the human auditory nerve and a large proportion of these convey information to the brain about the speech frequencies. Research studies are showing, however, that the perception of ongoing speech with cochlear implants may be achieved 'With speech processing strategies which can be achieved by current electronic technology.
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    Steady-state evoked potentials to amplitude-modulated tones
    Rickards, F. W. ; Clark, Graeme M. (Butterworths, 1984)
    This study is an investigation of auditory evoked potentials (AEPs) to amplitude-modulated (AM) tones. The majority of AEP studies describe transient AEPs to pure tones and clicks. These potentials include the brainstem auditory evoked potentials (BAEPs) and the middle- and long-latency cortical potentials. By contrast, the cochlear microphic (CM) and the frequency-following response (FFR) are sustained potentials observed during a pure tone stimulus.