金属橡胶材料双层结构吸声特性研究
Sound absorption characteristics of a double layer structure with metal-rubber material
The sound absorption characteristics of a double layer structure with metal-rubber(MR) material were investigated. Based on the formulae of acoustic characteristics of metal-rubber material, the acoustic impedance and sound absorption coefficient for two kinds of structure with rigid wall or air layer were calculated, respectively. The basic parameter for description of sonic characteristics of MR was determined by calculating the flow resistivity. The effects of the thickness of the matervial layer, the flow resistivity, and the thickness of the air layer on the sound absorption performance were analyzed. The performances of a single layer structure and double-layer one were compared. The research results indicated that the double-layer structure with a reasonable design shows good performance of sound absorption in a wide bandwidth of frequency.
金属橡胶材料 / 双层吸声结构 / 流阻率 {{custom_keyword}} /
metal-rubber MR material / double-layer structure / flow resistivity {{custom_keyword}} /
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