urban environmental noise

基本解释

The average level of urban environmental noise is changing with the changes of urban environmental function based on analyzing the noise monitoring data in recent years.
通过对历年噪声监测数据的分析，探讨了由于城市区域功能的改变，环境噪声监测数据反映的城市环境噪声平均水平的相应变化。
In this paper, the relationship between the altitude monitored values and the ground latticed measuring values of the urban environmental noise are derived theoretically.
本文就城市环境噪声的高空监测值与地面网格测值间的定量关系作了理论推导。
Ground measurements of latticed points are usually made and the mean energy of the measuring values is then found to determine the urban environmental noise in our country for the time being.
目前，我国确定城市环境噪声常采用地面网格点测值，再求其能量平均。