Based on the general weighted length, combined with the level characteristic value, a new method is put forward to evaluate the environmental noise of railway with fuzzy.

以加权广义权距离概念为基础，结合噪声污染级别特征值法提出一种铁路环境噪声评价的新方法。

youdao

According to the standard of aircraft noise environment around Airport (GB9660-88), LWECPN (Weighted Equivalent Continuous Perceived noise Level) is selected as noise metrics.

根据《机场周围飞机噪声环境标准(GB9660 - 88)》，以计权等效连续感觉噪声级LWECPN作为机场噪声评价量。

youdao