ExpORL, Department of Neurosciences, KU Leuven, O & N 2, Herestraat 49 bus 721, B-3000 Leuven, Belgium.
J Acoust Soc Am. 2012 Aug;132(2):611-4. doi: 10.1121/1.4733557.
Users of bilateral cochlear implants and a cochlear implant combined with a contralateral hearing aid are sensitive to interaural time differences (ITDs). The way cochlear implant speech processors work and differences between modalities may result in interaural differences in shape of the temporal envelope presented to the binaural system. The effect of interaural differences in envelope shape on ITD sensitivity was investigated with normal-hearing listeners using a 4 kHz pure tone modulated with a periodic envelope with a trapezoid shape in each cycle. In one ear the onset segment of the trapezoid was transformed by a power function. No effect on the just noticeable difference in ITD was found with an interaural difference in envelope shape, but the ITD for a centered percept was significantly different across envelope shape conditions.
使用双侧人工耳蜗植入物和人工耳蜗与对侧助听器相结合的用户对耳间时间差（ITD）敏感。人工耳蜗语音处理器的工作方式和模式之间的差异可能导致呈现给双耳系统的时间包络的形状存在耳间差异。使用正常听力听众，通过具有梯形形状的周期性包络调制的 4 kHz 纯音来研究包络形状的耳间差异对 ITD 敏感性的影响。在一只耳朵中，梯形的起始段通过幂函数进行转换。在包络形状上的耳间差异没有对 ITD 的可察觉差异产生影响，但是对于居中感知的 ITD 在包络形状条件下则存在显著差异。
