嵌入圆环结构薄膜材料的声传输特征及应用

The sound transmission characteristics and applications that the circle type structure embedded in membrane material

针对嵌入圆环结构薄膜材料基本单元,基于声传输特性以及带隙构成特点,研究了该结构在低频范围内的减振效果。研究了基本单元的隔声频响和带隙,分析了其圆环大小、高度、厚度等参数对隔声频响的影响规律。结果表明:随圆环大小而改变的隔声曲线交错较好;随圆环高度增加,隔声曲线各阶波峰对应频率都向低频方向偏移;随圆环厚度增加,隔声曲线各阶波峰对应频率都向高频方向偏移。将两个大小不同的圆环叠加,在低频范围内隔声范围线性叠加,隔声范围增加。

For basic unit embedded circle type structure of membrane materials, based on the sound transmission characteristics and band gap characteristics, the structure within the scope of the low frequency vibration damping effect is investigated. For the basic unit of sound insulation frequency response and band gap, the circle size, height, thickness and so on the influence law of parameters on the sound insulation frequency response are studied. The results show that the ring size associated with acoustic curve interleaving degree. As increase of the height, the corresponding order wave frequency sound insulation are moved forward. As increase of the thickness, the corresponding order wave frequency sound insulation are backwards. The superposition of two different sizes of rings, within the scope of the low frequency sound insulation range is the relationship between linear superposition, increased the range sound insulation.