noise-pollution meter

例句：

1. 1.The noise-pollution meter was used to measure the level of noise in the area.
   噪声污染计被用来测量该地区的噪音水平。
2. 2. The noise-pollution meter showed that the air quality in the city had improved significantly.
   噪声污染计显示该市的空气质量已显著改善。
3. 3.The noise-pollution meter helped us to identify the source of the noise pollution in the area.
   噪声污染计帮助我们确定了该区域噪声污染的来源。