试验表明，微穿孔板吸声结构可有效地降低排气噪声。
Results show that the acoustic system of micro perforation plate can effectively reduce discharge noise.
对穿孔板吸声结构的声学特性进行了理论分析与计算。
Theoretical analysis and calculation on the acoustic properties of perforated panel absorber were described herein.
微穿孔板吸声结构以其众多的优点，在噪声控制领域得到越来越广泛的应用。
Microperforated panel absorbers are getting more and more widely use in noise control field for it's large advantage.
本文的研究成果可为声学工程师及建筑师提供穿孔板吸声结构设计的参考资料。
In this paper, the results of research can provide the design reference of the perforated-panel absorbers for acoustic engineers and architects.
本文尝试利用有限元法通过计算机模拟来研究穿孔板吸声结构的模态频率和布置位置。
This paper attempts to use finite element method through computer simulation to study the absorption characteristics of the perforated-panel absorbers.
文中给出计算及测量结果，并说明了影响微穿孔板吸声结构特性的因素，以及在实际应用中的注意点。
The results of calculation and measurement are presented, and some factors which affect the characteristics of MPA are given in the paper.
以某飞机座舱模型为研究对象，利用微穿孔板吸声结构成功实现了一套飞机座舱模型内部噪声无源控制系统。
Some experimental research work has been done on the passive noise control of the fighter cockpit, because of the larger noise generating under some circumstance.
台架实验和整车道路实验均表明，两种结构对降低后桥异响均有显著效果，车内异响噪声亦得以基本消除，且亥姆霍兹穿孔板吸声结构的效果略优于薄膜阻尼消声结构。
The results of bench test and road test show that the abnormal noise reduced greatly after the improvement and the Helmholtz resonance structure is better than the film-damping structure.
研究表明，随着气流马赫数的增加，吸声结构的消声系数明显下降，微穿孔板的非线性声阻和声质量修正值都略有减少。更需注意，在高速流条件下吸声结构的共振峰将会发生偏移。
It is shown that the attenuation coefficient will decrease obviously with the increase of Mach number, and the nonlinear acoustic resistance and acoustic mass will reduce slightly.
研究表明，随着气流马赫数的增加，吸声结构的消声系数明显下降，微穿孔板的非线性声阻和声质量修正值都略有减少。更需注意，在高速流条件下吸声结构的共振峰将会发生偏移。
It is shown that the attenuation coefficient will decrease obviously with the increase of Mach number, and the nonlinear acoustic resistance and acoustic mass will reduce slightly.
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