Sułkowski W, Kowalska S, Lipowczan A
Med Pr. 1986;37(3):175-86.
Hearing thresholds have been measured in 236 cotton weaving mill workers (124 women: average age 42.5 +/- 11.2 years, average length of employment 19.5 +/- 10.6 years and 112 men: average age 41.2 +/- 10.3 years, average length of employment 19.0 +/- 11.1 years) exposed to continuous broadband noise of the constant level of approx. 100 dB-A. 90% of subjects exhibited the permanent threshold shift characterized by a great individual variability and maximum loss at the 4 kHz frequency. Those lesions were getting enhanced with increasing length of exposure and were more serious in elder age groups. No significant differences between the hearing loss intensity in men and women were found. The development of the hearing loss is characterized by its rapid increase within 3, 4 and 6 kHz during the initial 8 years of exposure, stabilization between years 9-12 and slow moderate increase within the further 13-31 years of exposure. Those conclusions should be implemented into practice through an increase in the frequency of preventive audiometric tests in the initial period of work in exposure which has such a great impact on the development of the hearing impairment.
对236名棉纺织厂工人（124名女性：平均年龄42.5±11.2岁，平均工作年限19.5±10.6年；112名男性：平均年龄41.2±10.3岁，平均工作年限19.0±11.1年）进行了听力阈值测量，这些工人暴露于约100 dB-A恒定水平的连续宽带噪声中。90%的受试者表现出永久性阈值偏移，其特点是个体差异很大，且在4 kHz频率处损失最大。这些损伤随着暴露时间的增加而加重，在老年组中更严重。未发现男性和女性听力损失强度有显著差异。听力损失的发展特点是在暴露的最初8年内，3、4和6 kHz频率处迅速增加，9至12年之间稳定，在进一步暴露的13至31年内缓慢适度增加。这些结论应通过在对听力损害发展有重大影响的暴露工作初期增加预防性听力测试的频率来应用于实践。
