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  • Title: [Improvement of clinical results by digitalization of a single channel cochlear implant].
    Author: Fugain C, Jacquier I, Monneron L, Secqueville T, Meyer B, Chouard CH.
    Journal: Ann Otolaryngol Chir Cervicofac; 1992; 109(3):142-7. PubMed ID: 1444090.
    Abstract:
    For 1973 we have been among the first to claim the multichannel cochlear implant superiority regarding single channel efficacy. However we actually thing that single channel cochlear implant is indispensable in case of total ossified cochlea, and very useful when efficacy/coast ratio must be considered. In order to narrow the gap between multi and single channel device efficacy, we used the new microprocessors possibilities to digitalize the analogic emietter of the single channel system, which we designed in 1987. Owing to a PC keyboard the new emietter allows the speech therapist to select the frequency band width of the input signal, and to determine the threshold level and the dynamic value as a function of six steps values of the stimulus wave frequency. These improvements supply the patient with a better speech intelligibility excepted for vowels discrimination. Comparison of clinical results obtained through the two analogic and digital systems are reported on 4 post lingually and 4 pre lingually deaf patients.
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