Graeme Clark Collection

Permanent URI for this collection

http://hdl.handle.net/11343/375

Filters

1992 - 1993 2
Reset filters

Settings
Statistics
Citations
Type: Book Chapter × Author: Blamey, Peter × Subject: cochlear implant ×

Search Results

Now showing 1 - 2 of 2
  • Item
    Thumbnail Image
    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.
  • Item
    Thumbnail Image
    Pattern recognition and masking in cochlear implant patients
    Blamey, P. J. ; Dooley, G. J. (Elsevier Science Publishers, 1993)
    Studies of the temporal course of masking using pulsatile electrical stimulation provide a sensitive new technique for the investigation of central pattern recognition. The masked threshold for a single-pulse probe was studied for several different maskers as a function of the time between the probe and the start of the masker. These experiments showed the gradual development of a temporal pattern in the masked thresholds as the number of pulses in the masker was increased. For a 210 msec masker with pulses at 10 msec intervals, both backward and forward masking thresholds showed a well-defined peak at times 10 msec before and after the masker. Probe pulses presented at these times were probably perceived to be part of the masker pattern and therefore were not easily identified as probe pulses. This conclusion was confirmed by using a masker with pulses at 20 msec intervals. Only backward masking was tested, and the results showed a peak approximately 20 msec before the start of the masker, fitting in with the temporal pattern of the masker.