noise curve

例句：

1. 1.The noise curve shows the distribution of sound levels across the room.
   噪声曲线显示了房间内声级分布情况。
2. 2. The noise curve was used to estimate the number of people in the room.
   噪声曲线被用来估计房间里的人数。
3. 3.The noise curve was used to study the effects of different sources on the overall noise level.
   噪声曲线被用来研究不同来源对总体噪音水平的影响。