Blamey P J, Dowell R C, Tong Y C, Clark G M
J Acoust Soc Am. 1984 Jul;76(1):97-103. doi: 10.1121/1.391012.
A set of bandpass filtered, pulsed noise stimuli presented to three normally hearing subjects was found to have psychophysical properties similar to those of a set of pulsed electrical stimuli presented to two cochlear implant patients. Identical procedures were used to compare the performances of the two groups of subjects in the following tasks: (a) pulse rate difference limen measurements, (b) pitch scaling for stimuli differing in pulse rate, (c) pitch scaling and categorization of stimuli differing in filter frequency or electrode position, and (d) similarity judgments of stimuli differing in pulse rate and filter frequency or electrode position. By choosing the parameters of the acoustic stimuli appropriately, a high level of agreement between the two sets of results was achieved. Electrical stimuli on electrodes at different sites in the cochlea were matched with pulsed noise passed through bandpass filters with different center frequencies. Matching was achieved for equal electrical and acoustic pulse rates.
研究发现，向三名听力正常的受试者呈现的一组带通滤波的脉冲噪声刺激，其心理物理学特性与向两名人工耳蜗植入患者呈现的一组脉冲电刺激相似。采用相同的程序比较两组受试者在以下任务中的表现：(a) 脉冲率辨别阈测量；(b) 对脉冲率不同的刺激进行音高标度；(c) 对滤波频率或电极位置不同的刺激进行音高标度和分类；(d) 对脉冲率以及滤波频率或电极位置不同的刺激进行相似性判断。通过适当选择声学刺激的参数，两组结果之间达成了高度一致。耳蜗中不同部位电极上的电刺激与通过具有不同中心频率的带通滤波器的脉冲噪声相匹配。在电脉冲率和声学脉冲率相等的情况下实现了匹配。
