Aimed at the jet noise which is induced by the expand structure and tail tube in the resistant muffler, a finite element model at low Mach number was developed.

针对抗性消声器中扩张结构和尾管引起的射流噪声问题，建立了低马赫数射流噪声有限元分析模型。

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Based on the sound absorption mechanism of Helmholtz Resonator, the advantage of soft tube length is fully used in the new structure, and thus the low-frequency noise can be controled easily.

提出了一种新型的宽频带共振吸声结构，该结构基于赫姆霍兹共振吸声机理，并充分利用了软管在长度上的优势，易于实现对低频噪声的控制。

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