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对101例受噪声及振动联合作用的航运工进听力状况研究,他们的平均年龄为42.3岁,平均工龄14.7年,其中56例在工作班内连续作业12小时,45例连续工作24小时。对照组为不接触噪声和振动的码头工人。听力损失计算是将实测值减去年龄修正值。发现在频率500～8000Hz,听阈提高超过20分贝的不同程度听力损失的发生率为82.3%,听觉迟钝型为89%,混合型11%。观察到连续工作24小时的听力损失明显大于工
A study of 101 hearing-impaired shipworkers exposed to noise and vibration found that their average age was 42.3 years and their average length of service was 14.7 years. Of these, 56 worked continuously for 12 hours and 45 worked continuously for 24 hours. The control group was dock workers not exposed to noise and vibration. Hearing loss is calculated by subtracting the age correction value. Found in the frequency of 500 ~ 8000Hz, hearing threshold increased more than 20 dB of hearing loss of varying degrees was 82.3%, 89% of hearing loss, mixed 11%. The observed 24 hours of continuous hearing loss was significantly greater than workers