本标准是对同名国际标准ISO 1999:1990（E）的改编。不像国际 标准，本标准允许使用时间/强度交易关系（而非3-dB增加）评估噪声暴露 每减少一半暴露时间。本标准从统计学角度阐述了噪声暴露与环境变化之间的关系 噪声暴露人群的听阈水平。本标准也可用于计算 由于每天持续暴露在噪音中而导致听力障碍。 提供了有关噪声测量的指南 面临

This standard is an adaptation of the international standard ISO 1999:1990(E) of the same name. Unlike the international standard, this standard allows assessment of noise exposure using a time/intensity trading relation other than a 3-dB increase per halving of exposure time. This standard presents, in statistical terms, the relationship between noise exposure and changes in hearing threshold levels for a noise-exposed population. This standard can also be applied to the calculation of the risk of incurring hearing handicap from sustained daily exposure to noise. Guidance is provided as to the measurement of noise exposure.