Abstract
We performed a speech perception experiment using CI 2004 monosyllable lists and 67-S lists in Cochlear Implant (CI) users [n=19], to evaluate the effects of different monosyllable lists on the test outcomes. The results showed that average speech perception reached 61.0% with the CI 2004 list and 78.0% with the 67-S list, the latter providing significantly better speech recognition. Comparison of between the common monosyllable lists revealed an average level of 62.6% for CI 2004 and an average of 74.6% for 67-S, the difference not being statistically significant. Statistical analysis of the test results showed no significant differences in speech perception for presentation levels in the range of 40dBHL to across various presentation levels (40, 50, 55, 60, and 70dB HL)
Speech perception tests involve auditory psychophysics. The presentation level, type and number of monosyllables, and differences in spoken stimuli can influence the test performance. This study showed that only the type of monosyllabic words influenced the results. As there is no standardized approach for the assessment of CI recipients in Japan, it would be important that scientists and academic societies work together to create assessment guidelines for effective and comparable hearing assessment methods.
