Experiment and analysis on sound absorption characteristics of metal rubber
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摘要: 根据已经建立的金属橡胶材料的吸声理论模型,采用阻抗管法对不同参数下金属橡胶材料的吸声系数和声阻抗进行了试验测量和研究.进一步考察了金属橡胶结构参数(丝径、厚度、孔隙率、背后空腔深度等)对其吸声特性的影响及影响规律.并与该理论模型的计算结果进行了对比分析,验证了该模型的准确性,进而为金属橡胶在吸声降噪方面的工程应用提供了试验方法,为进一步完善该理论奠定基础.Abstract: According to the established sound absorption model of metal rubber(MR), the measurement and research for the coefficient and acoustic impedance of MR, which is of different parameters, were carried. The influencing laws of MR-s structural parameters (such as wire diameter, thickness, porosity, cavity size and so on) on its sound absorption characteristics were investigated. With the comparative analysis between the experimental results and the calculated ones from the theoretical model, the acoustic model was proved accurate. It not only provides experiment method for the further engineering application of MR in the field of noise reduction, but also set up a basis for the theory improvement.
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Key words:
- metal rubber /
- experimental research /
- noise reduction
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