Finkenzeller P
Audiology. 1980;19(2):176-87. doi: 10.3109/00206098009072659.
To achieve speech discrimination with prosthetic stimulation, pre-processing of speech adapted to the function to be replaced is indispensable. This is demonstrated using the example of a phase-conserving frequency transposition for a more efficient use of residual hearing. The intelligibility of transposed speech was investigated by employing simulated residual hearing. Long-term implanted electrodes in the auditory nerve of the cat permitted both the measurement of the natural activity of fibres and the application of corresponding stimulus currents. Phase reversal of the acoustic input was used to isolate a phasic response with a topographically differing proportional or differential behaviour. This suggests a periodicity analysis of the sound in the auditory pathway. In acoustic and electrical stimulation, additionally implanted, cortical control electrodes revealed largely corresponding potentials; the dynamic stimulation ranges, however, differed greatly. Finally, the possibility of assessing speech perception by measuring speech-evoked potentials is discussed.
为了通过假体刺激实现言语辨别，对适应于要被替代功能的言语进行预处理是必不可少的。这通过一个用于更有效利用残余听力的相位保持频率转换的例子得到了证明。通过采用模拟残余听力来研究转换后言语的可懂度。猫听神经中的长期植入电极既允许测量纤维的自然活动，也允许施加相应的刺激电流。利用声音输入的相位反转来分离具有不同拓扑比例或差异行为的相位响应。这表明对听觉通路中的声音进行周期性分析。在声学和电刺激中，额外植入的皮质控制电极显示出很大程度上对应的电位；然而，动态刺激范围差异很大。最后，讨论了通过测量言语诱发电位来评估言语感知的可能性。
