flow noise spectrum

例句：

1. 1.The engineer used a special filter to reduce the flow noise spectrum during testing.
   工程师使用特殊的过滤器来减少测试中的流动噪声谱。
2. 2.The study analyzed the flow noise spectrum of the river to understand its environmental impact.
   该研究分析了河流的流动噪声谱，以了解其对环境的影响。
3. 3. The noise spectrum analysis helps engineers design better acoustic barriers for their buildings.
   噪声谱分析帮助工程师设计更好的建筑声学屏障。