Papsin B C, Abel S M
Department of Otolaryngology, Mount Sinai Hospital, Toronto, Ontario.
J Otolaryngol. 1988 Apr;17(2):93-100.
A study was conducted to explore variations in auditory temporal summation in listeners with normal hearing, and impairment due to otosclerosis, sensori-neural hearing loss and acoustic neuroma. Using a two-interval forced-choice procedure the detection threshold was measured for one-third octave noise bands centered at either 1000 or 4000 Hz, in combination with eight signal durations (2.5, 5, 10, 20, 40, 80, 160, and 640 ms). The results indicated that for normal listeners: (1) the slope of the function relating the detection threshold and the signal duration varied inversely with the frequency tested, and (2) the variability in the detection threshold was greater for 4000 Hz than for 1000 Hz. A comparison of performance across groups showed that the magnitude of the slope of the temporal integration function decreased as the site of lesion moved from middle ear to eighth nerve. For listeners with normal hearing and those with otosclerosis, temporal integration appeared to be incomplete at 640 ms.
一项研究旨在探索听力正常者、因耳硬化症、感音神经性听力损失及听神经瘤导致听力受损者在听觉时间总和方面的差异。采用两间隔强迫选择程序，测量了以1000赫兹或4000赫兹为中心的三分之一倍频程噪声带的检测阈值，并结合了八个信号持续时间（2.5、5、10、20、40、80、160和640毫秒）。结果表明，对于听力正常的受试者：（1）检测阈值与信号持续时间之间关系的函数斜率与测试频率成反比，且（2）4000赫兹时检测阈值的变异性大于1000赫兹时。不同组之间的表现比较显示，随着病变部位从中耳移至第八对脑神经，时间整合函数斜率的幅度减小。对于听力正常的受试者和耳硬化症患者，在640毫秒时时间整合似乎并不完整。
