设计并研制了一种微穿孔玻璃短纤维聚酯树酯/聚氨酯泡沫夹层复合材料吸声板结构，并用双通道驻波管法对吸声结构的吸声性能进行了实验研究，分析了吸声板结构参数和材料参数对吸声效率的影响，结果表明：该复合材料吸声结构具有优良的吸声能力和较高的性能价格比。%The testing results reported in this paper belongs to a part of the project "Application of Composite Material in Vibration and Noise Control of Elevators", supported by United Technology Company, U.S. The CSSMP samples are made of spraying-shaped short-fiberglass/polyester-resin panels, stuffed with polyester foam and drilled micro-pores in one surface.rn The testing were performed by using standing-wave tube(or the impedance tube)B&K4002 with 100mm tube diameter. During testing, the maximum value max(PA) and the minimum value min(PA) of sound pressure amplitudes in the impedance tube are measured by changing the position of sound-pressure probe. The stationary wave ratio G and the sound absorption coefficient α are computed.rn In experiments, we have measured the sound absorption coefficients (SAC) of 18 samples. The testing results indicate that CSSMP has noticeable sound absorption ability. The SAC varies from 0.3 to 0.9 at 100-1800Hz frequency range. Finally, the influence of material and structure parameters on SAC of CSSMP samples are analyzed in detail ,such as porosity level, pore diameter, fiber ratio, thickness and density of panels and foam stuffed, etc.
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