Pitch comparisons of acoustically and electrically evoked auditory sensations
Pitch comparisons of acoustically and electrically evoked auditory sensations
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DOI：
10.1016/s0378-5955(96)00095-0
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发表时间：
1996-09-15
期刊：
影响因子：
2.8
通讯作者：
Clark, GM
中科院分区：
文献类型：
--
作者：
Blamey, PJ;Dooley, GJ;Clark, GM
在未植入耳蜗的耳朵中有一些残余听力的人工耳蜗使用者比较了纯音和脉冲电刺激产生的音高感觉。在将电脉冲速率固定为100,250或800 pps的情况下，在不同位置（电极）呈现纯音和电刺激，获得了音高比较。同样，在耳蜗的两个固定电极位置（耳尖和耳底）进行不同脉冲率的电刺激时，音高进行了比较。电极位置和脉冲速率都影响到电信号的感知音高，并且在很宽的频率范围内发现了“匹配”的电信号和声信号。听众之间的差异很大。对于某些刺激，听者很难判断是声音刺激高还是电刺激高。尽管存在可变性，但从数据中获得了一致的趋势：对于所有脉冲速率，更高的频率往往与更多的基础电极相匹配。对于两个电极位置，更高的频率倾向于由更高的脉冲速率行进。“匹配”纯音的电极位置比正常人耳蜗基底膜的特征频率坐标预测的更基础。
Cochlear implant users with some residual hearing in the non implanted ear compared the pitch sensations produced by acoustic pure tones and pulsatile electric stimuli. Pitch comparisons were obtained for pure tones and electrical stimuli presented at different positions (electrodes) in the scala tympani, keeping the electric pulse rate fixed at 100, 250, or 800 pps. Similarly, pitch comparisons were obtained for electrical stimuli with variable pulse rates presented to two fixed electrode positions (apical and basal) in the cochlea. Both electrode position and pulse rate influenced the perceived pitch of the electrical signal and 'matched' electric and acoustic signals were found over a wide range of frequencies. There was a large variation between listeners. For some stimuli, listeners had difficulty in deciding whether the acoustic or electric stimulus was higher in pitch. Despite the variability, consistent trends were obtained from the data: higher frequencies tended to be matched by more basal electrodes for all pulse rates. Higher frequencies tended to be marched by higher pulse rates for both electrode positions. The electrode positions that 'matched' pure tones were more basal than predicted from the characteristic frequency coordinates of the basilar membrane in a normal human cochlea.