Abstract
A new light sound insulation structure was proposed in the previous paper, which was constructed with pressurized light inflated membrane bound by hard wire nets. The sound insulation mechanism of that structure is examined in this paper by some parameter tests and simulations. As the results, the following facts are proved. This structure 18 simulated by a parallel impedance model of the membranes and wire nets. In the low frequency region, the rigidity of the pressurized wire nets with membrane dominates the sound insulation performance and the rigidity of the small piece of membrane bounded by the wire nets dominates it in the higher frequency region.
