Reiss Lina A J, Perreau Ann E, Turner Christopher W
Oregon Health and Science University, Portland, OR 97239, USA.
Audiol Neurootol. 2012;17(6):357-72. doi: 10.1159/000341165. Epub 2012 Aug 14.
Because some users of a Hybrid short-electrode cochlear implant (CI) lose their low-frequency residual hearing after receiving the CI, we tested whether increasing the CI speech processor frequency allocation range to include lower frequencies improves speech perception in these individuals. A secondary goal was to see if pitch perception changed after experience with the new CI frequency allocation. Three subjects who had lost all residual hearing in the implanted ear were recruited to use an experimental CI frequency allocation with a lower frequency cutoff than their current clinical frequency allocation. Speech and pitch perception results were collected at multiple time points throughout the study. In general, subjects showed little or no improvement for speech recognition with the experimental allocation when the CI was worn with a hearing aid in the contralateral ear. However, all 3 subjects showed changes in pitch perception that followed the changes in frequency allocations over time, consistent with previous studies showing that pitch perception changes upon provision of a CI.
由于一些混合短电极人工耳蜗（CI）使用者在接受CI后失去了低频残余听力，我们测试了将CI言语处理器频率分配范围扩大到包括更低频率是否能改善这些个体的言语感知。第二个目标是观察在使用新的CI频率分配后音高感知是否发生变化。招募了三名在植入耳中已失去所有残余听力的受试者，使用一种实验性CI频率分配，其低频截止频率低于他们当前的临床频率分配。在整个研究过程中的多个时间点收集了言语和音高感知结果。总体而言，当在对侧耳佩戴助听器并使用CI时，受试者在采用实验性分配时言语识别几乎没有改善或没有改善。然而，所有3名受试者的音高感知都随着时间的频率分配变化而变化，这与先前表明提供CI后音高感知会发生变化的研究一致。
