飞机噪声对不同岗位机务人员听力的影响

目的比较噪声对不同岗位机务人员听力的影响。方法选取某军区空军机务人员作为调查对象，按照工作岗位分为机械组（736人）、军械组（294K）、电子组（334人）、特设组（350）k）四组。采用电测听仪检查所有被试人员纯音听力。结果四组机务人员均出现一定比例的听力障碍，分别为机械12．0％，军械9．5％，电子10．2％，特设12．0％；高频听力受损分别为机械45．1％，军械45．5％，电子34．8％，特设57．7％。特设组显著高于其他三组（P〈0．01）。各组机务人员的高频听力受损的最敏感频率均为6000Hz，在听力图上呈现典型的V形凹陷。结论噪声对机务人员的听力均有不良影响，高频听力受损发生率高，且以6000Hz最为敏感，特设人员高频听力受损高于其他工种。

Effect of aircraft noise on hearing of ground crew with different positions

Objective We directed to study the effect of military aircraft noise on hearing of ground crew with different positions. Methods 1714 military ground crew were chosen for the survey. They were divided into 4 groups： Machinery （736）, Ordnance （294）, Avionics （334）, and Special Equipment （350）. Hearings of all subjects were tested by electric audiometer Results Hearing damage occurred in all the four groups of ground crew as follows： Machinery 12.0%, Ordnance 9.5%, Avionics 10.2%, and Special Equipment 12.0%. The high-fr hearing impairment were very common in ground crew： Machinery 45.1%, Ordnance equency 45.5%, Avionics 34.8%, and Special Equipment 57.7%, and the incidence for the Special Equipment was significantly higher than the other three groups （P〈0.01）. Meanwhile, the most sensitive frequency of the high-frequency hearing impairment occurred at 6000 Hz in all the four groups, suggesting a typical ＂V＂-shaped trough in the audiogram. Conclusion For hearing damage, there was no apparent difference among different military impairment in the special equipment group was worse ground than th crew, while high-frequency hearing e otherthree groups