van Heuven V J, van den Broecke M P
J Acoust Soc Am. 1979 Nov;66(5):1308-15. doi: 10.1121/1.383551.
There are indications in the literature on speech perception that differences in rise and decay times of the amplitude envelope are relevant physical correlates in phonemic contrasts. Yet, little is known about the perception of rise and decay times as such. In the present study we have attempted to establish JND's for both rise and decay times of 1000-Hz sine waves as well as white noise bursts by means of an adjustment method. The rise and decay of stimulus amplitude were synthesized to be linear functions of time. Results show that the JND for a change in rise/decay time is generally about 25% of the duration of the rise/decay time. This Weber fraction is a minimum at rise/decay times of about 80 ms and increases significantly for rise/decay times below 20 ms. Of the four signal condition noise bursts were performed with the greatest accuracy (at moderate rise/decay times), while changes in onset time of sine waves were discriminated best at very short rise times (where energy splatter may have contributed an additional cue).
言语感知方面的文献表明，振幅包络的上升和衰减时间差异是音位对比中相关的物理关联因素。然而，对于上升和衰减时间本身的感知却知之甚少。在本研究中，我们试图通过一种调整方法来确定1000赫兹正弦波以及白噪声脉冲的上升和衰减时间的差别阈限（JND）。刺激振幅的上升和衰减被合成为时间的线性函数。结果表明，上升/衰减时间变化的差别阈限通常约为上升/衰减时间持续时长的25%。这个韦伯分数在上升/衰减时间约为80毫秒时最小，而在低于20毫秒的上升/衰减时间时显著增加。在四种信号条件中，噪声脉冲的执行精度最高（在中等上升/衰减时间时），而正弦波起始时间的变化在非常短的上升时间时辨别得最好（此时能量散射可能提供了额外的线索）。
