The character of exposure-responserelationship between particulate matter and population mortality has been one of the critical and difficult problems in air pollution epidemiological study.
Objective To study the dose responserelationship between noise exposure and prevalence of noise induced hearing loss(NIHL)in man aircraft maintenance workers.
目的探讨男性飞机维修人员噪声暴露与噪声性听力损失(NIHL)患病率之间的剂量反应关系。
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Objective to study dose responserelationship between cumulative exposure to silica and cumulative incidence of pneumoconiosis.