GB/T 21230-2014 in English

《GB/T 21230-2014声学 职业噪声暴露的测定 工程法》由TC17（全国声学标准化技术委员会）归口，主管部门为中国科学院。

Scope

This standard specifies an engineering-level method for measuring the noise exposure of workers in the work environment and for calculating the exposure level. This standard adopts A-weighted sound level, but C-weighted sound level can also be used. The standard specifies three different measurement methods. The method is applicable to occasions requiring engineering-level noise exposure determination, such as detailed studies of noise exposure, epidemiological studies of hearing impairment and other harmful effects. The measurement process requires observation and analysis of the conditions of noise exposure in order to be able to control the quality of the measurement. This International Standard also provides methods for estimating the uncertainty of results. This standard does not assess the masking effects of oral conversations, nor does it assess the non-auditory effects of infrasound, ultrasound and noise. This standard does not apply to the measurement of noise exposure of the human ear while wearing hearing protectors. Measurement results obtained in accordance with this standard can provide useful information for optimizing noise control measures.