Plack C J, Moore B C
Department of Experimental Psychology, University of Cambridge, CB2 3EB, England.
J Acoust Soc Am. 1991 Dec;90(6):3069-76. doi: 10.1121/1.401781.
The smallest detectable duration of a brief decrement in the intensity of wideband noise was measured as a function of the depth of the decrement. In the first experiment, conditions were tested in which the noise before the decrement was more intense than the noise after the decrement, and vice-versa. These data were used to estimate the shape of an intensity-weighting function, or temporal window, describing the temporal resolution of the ear. The equivalent rectangular durations (ERDs) of the temporal windows measured in this way had values of about 5.5, 4.6, and 6.6 ms for noise spectrum levels of 10, 30, and 50 dB, respectively. In a second experiment, decrement detection was measured in subjects with unilateral sensorineural hearing loss. One set of thresholds was measured in the impaired ear, and two sets of thresholds were measured in the normal ear; one with the noise level at equal SPL to the level in the impaired ear, and one with the noise at equal SL. Temporal window shapes were also estimated from these data. Only one of the subjects showed reduced temporal resolution in the impaired ear, the other two subjects having similar ERD values for all three conditions.
测量宽带噪声强度短暂下降的最小可检测持续时间，并将其作为下降深度的函数。在第一个实验中，测试了下降前的噪声比下降后的噪声更强以及反之亦然的条件。这些数据用于估计描述耳朵时间分辨率的强度加权函数或时间窗口的形状。以这种方式测量的时间窗口的等效矩形持续时间（ERD）对于10、30和50 dB的噪声频谱水平分别约为5.5、4.6和6.6毫秒。在第二个实验中，测量了单侧感音神经性听力损失患者的下降检测。在患耳中测量了一组阈值，在正常耳中测量了两组阈值；一组噪声水平与患耳中的水平相同声压级，另一组噪声水平与患耳中的水平相同听力级。还从这些数据估计了时间窗口形状。只有一名受试者在患耳中表现出时间分辨率降低，其他两名受试者在所有三种条件下具有相似的ERD值。
