Abstract
The speech perception performance of recipients of 22 channel cochlear implant was compared with that of patients using hearing aid. Subjects were post-lingually deafened adults including 31 patients using hearing aid and 48 recipients of cochlear implant. Speech perception test consisted of 5 bowels, 50 monosyllables, and 500 Japanese words. These test materials were heard by tape recorder.
The means and standard deviations of the percentage giving the correct answer using a new coding strategy, SPEAK, were 84.8±15.0% for vowels, 34.0±17.5% for monosyllables, and 31.6±22.4% for words, and was better than those using F0 F1 F2 or MPEAK coding strategy. This speech perception ability in recipients of cochlear implant corresponded to that in patients using hearing aid with hearing level of 80-85dB. This improvement of the coding strategy indicated that it is reasonable to extend cochlear implant to post-lingually deafened adults obtaining poor benefit from hearing aid.
