Willeboer Christina, Smoorenburg Guido F
University Medical Center Utrecht, Hearing Research Laboratories, Utrecht, The Netherlands.
Ear Hear. 2006 Dec;27(6):789-98. doi: 10.1097/01.aud.0000240811.67906.55.
The objective of the present study is to improve the efficiency of the fitting procedure of cochlear implant processors by making use of measurements of the electrically evoked compound actio potential (ECAP) and live-voice speech.
In a randomised prospective cross-over design we compare speech performance of eighteen adult subjects when following the conventional fitting procedure to a procedure in which we use the profile of the ECAP threshold levels across the full electrode array measured intra-operatively. The overall level of the profile is shifted (by an equal amount of current units per electrode) until we find the threshold for live speech (new T levels) and the loudness comfort level (new C levels). Each fitting procedure is tested for 6 wk. Speech performance is measured in quiet and in noise every other week.
The results show little difference between the scores (Dutch CVC words) for the conventional fitting procedure and the ECAP based fitting, although the T and C levels may differ markedly.
The new fitting procedure is much faster and easier in the initial phase. Further improvement of performance may be obtained in a later stage of the fitting procedure by changing some individual electrodes on the basis of subjective responses.
本研究的目的是通过利用电诱发复合动作电位（ECAP）测量值和实时语音来提高人工耳蜗处理器的适配程序效率。
在一项随机前瞻性交叉设计中，我们比较了18名成年受试者在遵循传统适配程序时与在使用术中测量的整个电极阵列上ECAP阈值水平曲线的程序下的语音表现。将该曲线的整体水平进行移动（每个电极移动相同数量的电流单位），直到我们找到实时语音的阈值（新的T水平）和响度舒适水平（新的C水平）。每个适配程序测试6周。每隔一周在安静和噪声环境中测量语音表现。
结果表明，传统适配程序和基于ECAP的适配程序的得分（荷兰语CVC单词）之间差异不大，尽管T和C水平可能有显著差异。
新的适配程序在初始阶段更快且更容易。在适配程序的后期，通过根据主观反应改变一些个别电极，可能会进一步提高性能。
