Click 音列时频规则知觉加工的双重机制。

Dual mechanisms in the perceptual processing of click train temporal regularity.

机构信息

Department of Psychology and Neuroscience and Department of Surgery, Dalhousie University, 1355 Oxford Street, PO Box 15000, Halifax, Nova Scotia, Canada B3H 4R2.

出版信息

J Acoust Soc Am. 2012 Jul;132(1):EL22-8. doi: 10.1121/1.4728193.

DOI:10.1121/1.4728193

PMID:22779568

Abstract

Two experiments measured human sensitivity to temporal jitter in 25-click trains with inter-click intervals (ICIs) between 5 and 100 ms. In a naturalistic experiment using wideband clicks, jitter thresholds were a nonmonotonic function of ICI, peaking for ICIs near 40-60 ms. In a subsequent experiment, clicks were high-passed and presented against a low-frequency noise masker. Jitter threshold vs ICI functions lost the positive slope over short ICIs but retained the negative slope at long ICIs. The same behavior was seen in click rate discrimination tasks. Different processes mediate regularity analysis for click trains with ICIs above and below 40-60 ms.

摘要

两项实验测量了人类对 25 次点击序列中时间抖动的敏感度，每个点击之间的间隔（ICI）在 5 到 100 毫秒之间。在一个使用宽带点击的自然实验中，抖动阈值与 ICI 呈非单调函数关系，在 ICI 接近 40-60 毫秒时达到峰值。在随后的实验中，点击被高通滤波，并在低频噪声掩蔽下呈现。抖动阈值与 ICI 的函数关系在短 ICI 时失去了正斜率，但在长 ICI 时保留了负斜率。在点击率辨别任务中也观察到了相同的行为。对于 ICI 大于和小于 40-60 毫秒的点击序列，不同的过程介导了规则性分析。