抄録
The ability to recognize consonants, especially voiceless plosives, is inadequate in patients with multi-channel cochlear implants. In order to establish a key for the recognition of voiceless plosives [p] [t] [k], we examined the consonant-vowel syllables [pa] [ta] [ka] and processed various syllables by computer; 1) the parts of a consonant signal were differentiated; 2) the connection of consonants and vowels in other syllables was determined; 3) the synthesis of the vowel [a] was studied in 10 repetitions of the first waveform. These processed syllables were examined by four doctors and one speech therapist.
For the recognition of voiceless plosives, a signal of at least 1 msec for the voiced onset of the consonant and a spectral information, especially at high frequencies, in regard to the vowels are important factors. The recognition of a short voice onset and emphasis of high frequency power are essential for the improvement of speech perception in cochlear implant.
