Graeme Clark Collection

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1992 - 1999 3
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Author: Vandali, Andrew × End date: 1999 × Start date: 1990 × Subject: cochlear implant × Subject: speech processor ×

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    Parameter selection and programming recommendations for the ACE and CIS speech processing strategies [Abstract]
    Plant, Kerrie L. ; Whitford, Lesley A. ; Psarros, C. E. ; Vandali, A. E. ; Clark, Graeme M. ( 1999)
    The Nucleus 24 Cochlear Implant system with the SPrint processor provides access to multiple speech processing strategies and a wide range of programming parameters. Strategy comparison studies have suggested that the optimal parameter set and coding strategy varies from individual to individual. It is necessary, however, to establish some default programming parameters and fitting guidelines. Therefore we have investigated the effect of stimulation rate and the number of channels or maxima in the ACE or CIS strategies, as well as the optimal programming strategy for subjects with a limited number of available electrodes. Speech perception was tested using monosyllabic words and sentences in noise, with the evaluation protocol designed to take into account learning effects. Take-home experience was provided with all programs, and subjects were asked to complete a comparative performance questionnaire regarding program preference. Six or eight subjects were enrolled in each study.
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    An improved speech processor for a 22-electrode cochelar implant [Abstract]
    Clark, Graeme M. ; McKay, C. ; McDermott, H. ; Vandali, A. ( 1992)
    A spectral maxima speech processing strategy ( SMSP) has been developed as a result of research to improve the speech perception performance of a multiple-channel cochlear implant. With this speech processing strategy. the six spectral maxima from the outputs of 16 band pass filters are used to stimulate the cochlea on a place basis at a constant rate. This SMSP strategy has been compared with the MSP-MULTIPEAK strategy, the present speech processor provided by Cochlear Pty. Limited, on four postlinguistically deaf adults. The study showed that the SMSP strategy was significantly better than the MSP-MULTJPEAK for the recognition of closed-set vowels and consonants, and open-set monosyllable words and sentences in background noise.