Mukhamedova G R
Vestn Otorinolaringol. 2009(6):19-21.
The objective of the present study was to evaluate characteristics of the hearing function in the subjects exposed to intense occupational noise. The audiologic examination involved members of locomotive crews of the railroad transport and included impedancometry, threshold tonal audiometry, and registration of two types of evoked otoacoustic emission (delayed evoked otoacoustic emission and distortion product otoacoustic emission). Characteristics of otoacoustic emission in subjects with occupational loss of hearing were compared with those in patients with neurosensory deafness of a different etiology. It was shown that registration of different classes of evoked otoacoustic emission makes it possible to recognize early pre-clinical signs of inner ear disorders caused by intense occupational noise. The changes are first and foremost apparent within a frequency band of 4 kHz. At the same time, registration of individual types of evoked otoacoustic emission does not permit to differentiate between occupational loss of hearing and neurosensory deafness of other origin.
本研究的目的是评估暴露于高强度职业噪声的受试者的听力功能特征。听力检查涉及铁路运输机车乘务员，并包括声阻抗测量、阈值纯音听力测定以及两种诱发耳声发射（延迟诱发耳声发射和畸变产物耳声发射）的记录。将职业性听力损失受试者的耳声发射特征与不同病因的感音神经性耳聋患者的耳声发射特征进行了比较。结果表明，记录不同类别的诱发耳声发射能够识别由高强度职业噪声引起的内耳疾病的早期临床前体征。这些变化首先在4kHz频段内最为明显。同时，记录个别类型的诱发耳声发射无法区分职业性听力损失和其他原因引起的感音神经性耳聋。
