Bartsch R, Brückner C, Dieroff H G
Z Gesamte Hyg. 1989;35(8):493-6.
We investigated a total of 537 patients (68 men, 469 women) working in the textile industry to ascertain their hearing level in the conventional hearing range as well as in the HF range. The persons tested work at 3 different noise levels (80-84, 85-89 and 90-94 dB [A] Leq). The differences in the hearing thresholds of the three sound level groups mentioned above were checked by means of discrimination analysis. The first hearing level changes noise levels below 90 dB develop mainly in the HF range; in the conventional hearing range, however, the hearing levels remain unchanged even during long exposure times. Hearing level impairment in the conventional range occurs only in the sound level group of 90-94 dB (A) Leq without attaining any social importance. The tests clearly show that if the noise level damage risk criterion of 85 dB (A) Leq at which hearing is impaired, is not exceeded any hearing lesions involving social hearing loss are definitely avoided.
我们共调查了537名从事纺织行业的患者（68名男性，469名女性），以确定他们在传统听力范围以及高频范围内的听力水平。接受测试的人员在3种不同噪声水平（80 - 84、85 - 89和90 - 94 dB [A] Leq）下工作。通过判别分析检查上述三个声级组听力阈值的差异。低于90 dB的噪声水平引起的首次听力水平变化主要发生在高频范围内；然而，在传统听力范围内，即使长时间暴露，听力水平仍保持不变。传统范围内的听力损伤仅发生在90 - 94 dB（A）Leq的声级组中，且未达到任何具有社会重要性的程度。测试清楚地表明，如果不超过85 dB（A）Leq这一听力受损的噪声水平损害风险标准，肯定可以避免任何涉及社会听力损失的听力损伤。
