噪声环境下传导性听力损失对骨导的保护作用分析

Analysis of protective effect of conductive hearing loss on bone conduction in noisy environment

目的探讨噪声环境下传导性听力损失对骨导是否存在保护作用。方法 2009—2011年在广州开发区医院进行噪声危害职业健康监护的所检人员中选出48例存在单耳传导性听力损失的健康检查者,对其骨导听力进行对比分析。结果所选健康检查人员中,6 kHz频段有34人双耳骨导差大于10 dB,其中最大相差50 dB;4 kHz频段有28人双耳骨导差大于10 dB,即在4 kHz(t=33.830)及6 kHz(t=48.471)频段,双耳骨导阈值差异有统计学意义(均P<0.05)。结论噪声环境下存在传导性听力损失对高频段听力,尤其是4 kHz和6 kHz频段的骨导具有保护作用。

[Objective]To explore whether the conductive hearing loss possess protective effect on bone conduction in noisy environment.[Methods]A total of 48 workers who had monaural conductive hearing loss and received occupational health surveillance of noise hazards in Hospital of The Guangzhou Development Zone from 2009-2011 were selected.Their bone conduction hearing levels was compared.[Results]Of all the selected objects,34 works has the difference of 2 ears＇ bone conduction more than 10 dB,and the maximum was 50 dB.;at 4 kHz,28 works had the difference of 2 ears＇ bone conduction more than 10 dB,which showed 4 kHz（t=33.830）and 6 kHz（t=48.471）,the differences of 2 ears＇ bone conduction were significant（both P0.05）.[Conclusion]The conductive hearing loss possesses protective effect on bone conduction of high-frequency hearing,especially at frequency band of 4 kHz and 6 kHz.