noise rating curve

例句：

1. 1. The noise rating curve shows the level of noise in different areas.
   噪声等级曲线显示了不同地区的声音水平。
2. 2. The noise rating curve helps us to determine the appropriate sound levels for our environment.
   噪声等级曲线帮助我们确定我们环境中适当的声音水平。
3. 3. The noise rating curve is used to measure the noise pollution in a particular area.
   噪声等级曲线用于测量特定区域的噪音污染。