现有噪声标准一般采用基于对人听觉影响的A声级作为评价量指标，而忽视了噪声对人的心理和精神方面的影响。
The a sound level on influencing humans' hearing sense normally adopt as an index in current noise assessment standards, though psychological and mental influence is neglected.
目的观察反复暴露于一定强度噪声对人听觉系统的影响。
Objective to study the effect on auditory system in human body of repeated exposure to a certain intensity noise.
发电机组等非道路设备由于其使用环境的原因，其噪声污染对人的影响更为严重。
For the reason of their in-use environment, the noise pollution of the generator sets and other non-road equipment have more serious negative effect on people.
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