Meanwhile, a group of experimental data of additional noise pressure level and fluid pressure loss generated by flow in a duct is presented to explain the readability of us...

由于声激波降噪需要附加一段具有高速流动的缩放管道，它会附加流动噪声和压力损失，本文提供了这方面的一组实验数据，以说明应用声激波消声器的现实可能性。

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Then there's increasing the number of rotor blades. This helps because each additional blade carries less of the weight of the helicopter, and thus produces less noise.

增加旋翼桨叶数量也是一种方法，这使得每片桨叶负载的直升机重量降低了，因此产生的噪音更小。

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The diagram does not consider additional constraints: decreased resolution due to diffraction and increased susceptibility to fixed pattern noise with longer exposures.

图表没有考虑其他限制因素：衍射造成的低分辨率，长时间曝光带来的对固定图形噪声的敏感性。

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The couple had also heard horror stories of neighbors demanding compensation from owners renovating lane houses to address such complaints as additional noise or dust.

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The application itself gained 20 objections surrounding increased noise and additional litter problems.

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Designers claim that plants not only provide a beautiful alternative to other materials used in construction, they also offer additional benefits, including noise reduction, natural cooling, air conditioning and a psychological boost to those who use the buildings.

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