This study was carried out to compare the speech perception ability in patients using hearing aids with hearing levels of 90dB or more (31 patients) and cochlear implant (66 patients). The patients with hearing aids were divided into group 55dB (hearing levels with hearing aids -55dB, 7 patients), group 56-60dB (56-60dB, 8), group 61-65dB (61-65dB, 6), group 66-70dB (66-70dB, 6), and group 71dB (71dB or more, 4). The patients with cochlear implant were using the strategies of F0F1F2 (15 patients), MPEAK (30 patients) and SPEAK (21 patients). In the cochlear implant patients, means correct answer with auditory and visual in F0F1F2, MPEAK and SPEAK were 47.3%, 44.5% and 65.6% for monosyllables, 44.8%, 56.3% and 73.4% for words, 66.0%, 60.5% and 84.7% for sentences. In comparison with the results of patients with hearing aids, the speech perception for F0F1F2 and MPEAK were eqivalent to those of group 55-70dB, and those for SPEAK was better than those of group 55dB. In other words, the speech perception ability in conventional cochlear implant strategies-F0F1F2 and MPEAK-was corresponding to that of patients with hearing levels with hearing aids of 55-70dB, but that in new strategy-SPEAK-showed better results than those of 55dB or less.
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