The rocket engine will generate strong jet noise, which is the tremendous pollution source.
火箭发动机启动后会产生强烈的气体喷流噪声,是发动机研制过程中的重大污染源,对发动机试验设备的正常运行、测试和参试人员的健康以及试验场内外环境都极为不利。
参考来源 - 火箭发动机地面试验喷流消声方案研究·2,447,543篇论文数据，部分数据来源于NoteExpress
分析了飞机的喷流噪声产生机理，讨论了喷流噪声的控制技术。
The jet wash noise generating mechanism of the flight has been analyzed. And the noise control technology of the airplane has been discussed.
接着推荐美国宾州大学噪声控制研究室关于喷流声功率与声压级的经验公式。
Some experimental formulae about jet sound power and jet noise pressure which are contributed by the noise Control Laboratory of the Pennsylvania State University are recommended.
而在超音速喷流中会产生喷流激波噪声。
When the jet is supersonic, there would bring the jet shock noise.
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