Viall J, Melnick W
Trans Sect Otolaryngol Am Acad Ophthalmol Otolaryngol. 1977 Mar-Apr;84(2):459-64.
Twelve men with mild to moderate sensorineural hearing loss in the frequency range of 3 to 6 kHz were exposed to 24 hours of continuous noise. The noise was an octave band centered at 4 kHz at a level of 85 dB. Hearing thresholds were measured monaurally at 11 test frequencies ranging from 250 to 10,000 Hz prior to exposure and at selected intervals during and after exposure. Temporary threshold shift (TTS) development followed a similar time course to that observed in normal hearing subjects, asymptotic levels being reached between 8 and 12 hours of noise exposure. Maximum TTS occurred at 4 and 6 kHz. The amount of TTS was less for the subjects with sensorineural hearing loss than for people with normal hearing. However, the sound pressure level required to detect pure tone (shifted thresholds) following noise exposure was greater in the group with hearing loss than was measured in the normal hearing subjects. Within the limits of this experiment, a sensorineural hearing loss does seem to exert a significant effect on change in hearing sensitivity resulting from noise exposure.
12名年龄在20至40岁之间、在3至6千赫兹频率范围内有轻度至中度感音神经性听力损失的男性，暴露于24小时的连续噪声中。该噪声是一个以4千赫兹为中心的倍频程带，声级为85分贝。在暴露前以及暴露期间和暴露后的选定时间间隔，以单耳方式在从250至10,000赫兹的11个测试频率上测量听力阈值。暂时阈移（TTS）的发展过程与正常听力受试者中观察到的相似，在噪声暴露8至12小时之间达到渐近水平。最大TTS出现在4千赫兹和6千赫兹处。感音神经性听力损失受试者的TTS量比正常听力者少。然而，噪声暴露后检测纯音（阈移）所需的声压级在听力损失组中比在正常听力受试者中测得的要高。在本实验的范围内，感音神经性听力损失似乎确实对噪声暴露导致的听力敏感度变化产生显著影响。
