法律上曾规定接触90分贝A的噪声值作为一个工作人群的安全标准值,但曾被反对。为此,近年来,在不同国家,认为接触噪声的标准应该降低到85分贝A。本追踪研究的目的是评价接触噪声标准为85分贝A的效果。 It was legally stipulated that noise levels approaching 90 dB A should be used as a safety standard for working people but were opposed. For this reason, in recent years, the standards of exposure to noise in different countries should be reduced to 85 dBA. The purpose of this follow-up study was to evaluate the effect of a 85 dB A contact noise standard.