通过直管噪声与带消声器的尾管声压级的对比，发现在低频段有一峰值。
We make a comparison in tailpipe noise between straight pipe and muffler, it is seen that there is a sharp peak in low frequent.
结果显示混合边界元方法在这类动边界声辐射问题上，能体现出声音传播的延迟效应，体现出液体压缩性对声压峰值的影响。
The result shows that the delay effect of noise propagation and the effect of the compressibility of liquid on the noise can be obtained.
结果显示混合边界元方法在这类动边界声辐射问题上，能体现出声音传播的延迟效应，体现出液体压缩性对声压峰值的影响。
The result shows that the delay effect of noise propagation and the effect of the compressibility of liquid on the noise can be obtained.
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