Dai H, Green D M
Department of Psychology, University of Florida, Gainesville 32611.
J Acoust Soc Am. 1993 Feb;93(2):957-65. doi: 10.1121/1.405456.
Thresholds for discriminating the changes in the spectral shape of simultaneously presented components (profile analysis) are measured as a function of stimulus duration for various complex stimuli. For all stimuli, the threshold decreases with increasing duration until a transition time is reached, and thereafter the threshold remains constant. The amount of change in threshold and the value of transition time appear to be greater for complexes having narrower frequency spacing of the components. The results can be accounted for, at least qualitatively, by assuming that the bandwidth of the auditory filters decreases after the onset of the stimulus.
针对各种复杂刺激，测量同时呈现成分的频谱形状变化（轮廓分析）的辨别阈值作为刺激持续时间的函数。对于所有刺激，阈值随持续时间增加而降低，直到达到一个过渡时间，此后阈值保持恒定。对于成分频率间隔较窄的复合体，阈值变化量和过渡时间值似乎更大。至少定性地说，通过假设刺激开始后听觉滤波器的带宽减小，可以解释这些结果。
