Ear Institute, University College London, London, UK.
Adv Exp Med Biol. 2013;787:223-30. doi: 10.1007/978-1-4614-1590-9_25.
Recently, Klein-Hennig et al. (J Acoust Soc Am 129:3856–3872, 2011) suggested a design for envelope waveforms that allows for independent setting of the duration of the four segments of an envelope cycle – pause, attack, sustain, and decay. These authors conducted psychoacoustic experiments to determine the threshold interaural time differences (ITDs) for different waveforms and revealed that a steep attack flank and at least 4 ms of pause duration prior to the attack are optimal for discrimination performance, whilst sustained and decay durations were of only minor influence. The current study tests the sharpness of rate-ITD-functions recorded in the inferior colliculus of guinea pigs in response to a similar set of waveforms, examining their relationship to the psychoacoustic data. Particular focus is applied to temporally asymmetric envelope waveforms: a long 15-ms attack and a short 1.5-ms decay envelope and the temporally inverted envelope with a short 1.5-ms attack and a long 15-ms decay.
最近，Klein-Hennig 等人（J Acoust Soc Am 129:3856–3872, 2011）提出了一种包络波形设计，允许独立设置包络周期的四个部分（暂停、攻击、维持和衰减）的持续时间。这些作者进行了心理声学实验，以确定不同波形的耳间时间差（ITD）阈值，并揭示出陡峭的攻击斜率和在攻击前至少 4 毫秒的暂停时间对于辨别性能是最佳的，而维持和衰减时间的影响较小。本研究测试了豚鼠下丘中记录的与类似一组波形相对应的速率-ITD 函数的锐度，研究了它们与心理声学数据的关系。特别关注的是具有时间不对称包络的波形：长的 15 毫秒攻击和短的 1.5 毫秒衰减包络，以及具有短的 1.5 毫秒攻击和长的 15 毫秒衰减的时间反转包络。
