Abstract:
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.
