Smurzyński J, Houtsma A J
Percept Psychophys. 1989 Jan;45(1):2-9. doi: 10.3758/bf03208025.
Two experiments are reported in which difference limens (DLs) were measured for onset times of a 1000-Hz tone pulse. An adaptive two-alternative forced-choice procedure and (mostly) well-trained subjects were used. In the first experiment, DLs were measured for the rise time of linear onset ramps at rise-time values between 10 and 60 msec. The DLs follow Weber's law up to a rise time of about 50 msec, and do not support the notion that rise times are perceived in a categorical manner. In the second experiment, DLs were obtained for linear, exponential, and raised-cosine onset envelopes at rise-time values between 10 and 40 msec. When energy differences in the critical band around 1000 Hz are computed for just-discriminable onsets, values between 0.7 dB (10-msec rise time) and 0.3 dB (40-sec rise time) are found. These equivalent intensity DLs show the same "near miss to Weber's law" behavior as do intensity DLs for pure tones.
本文报告了两项实验，其中测量了1000赫兹纯音脉冲起始时间的差别阈限（DLs）。实验采用了自适应二选一强制选择程序以及（大部分是）训练有素的受试者。在第一个实验中，在10至60毫秒的上升时间值范围内，测量了线性起始斜坡上升时间的差别阈限。差别阈限在大约50毫秒的上升时间之前遵循韦伯定律，并不支持上升时间是以分类方式被感知的观点。在第二个实验中，在10至40毫秒的上升时间值范围内，获得了线性、指数和余弦上升起始包络的差别阈限。当计算1000赫兹附近临界带宽内可刚辨别的起始的能量差异时，发现其值在0.7分贝（10毫秒上升时间）至0.3分贝（40毫秒上升时间）之间。这些等效强度差别阈限与纯音强度差别阈限表现出相同的“接近但未达到韦伯定律”的行为。
