强噪声环境下作业工人听力状况分析

目的为了解某集装箱厂环境噪声强度和作业工人的听力状况。方法对该厂噪声环境进行监测。用纯音听力计检查接触组100名工人和对照组103名工人的听力并分析检查结果。结果2007年所有环境噪声监测点均超标。接触组工人的双耳听力损伤基本一致，从听阈提高耳数的检出率、听阈的平均值与对照组比较，明显高于对照组（2000～6000Hz）（P〈0．01），左右耳在4kHz的听阈平均值最高左耳（31．80±1．12）dB，右耳（32．05±1．17）dB]。结论该集装箱厂生产过程的噪声对工人听力有影响，作业工人双耳在4kHz范围的听力损伤最大。厂方应加强改善噪声环境和对工人耳部的防护。

Investigation on Hearing-loss of Workers Exposed to High Level Noise

Objective To investigate the noise level at workplace and the hearing status of exposed workers in a container manufacturing plant. Methods The noise level was surveyed systematically at workplaces and the hearing status of 100 exposed workers and 103 non- exposed workers （as control） were examined with electronic audiometry. The hearing-loss level of workers between these two groups was comparied. Results The noise level at the workplaces is not compliant with national exposure limits in 2007. Both left and right ear was damaged. The hearing-loss rate or the average hearing threshold of varied Hertz in （2 000 - 6 000 Hz） of exposed workers were found higher compared with the control＇s （P〈0.01）. The highest was at the point of 4000 Hertz left ：（31.80±1.12） dB,right： （32.05± 1.17） dB]. Conclusion High level noise can cause heating-loss, especially at the point of 4 000 Hz. It is necessary to take engineering control measures in the workplaces while the personal protection should be given.