| 摘要 |
The present invention relates to noise prevention materials between stairs for a building to block and absorb the noise between the stairs, comprising: a first member formed by mixing and shaping of sawdust and a binder; and a first foaming layer connected on one side of the first member, wherein the first member and the first foaming layer include a porous mineral, preferably zeolite. According to the present invention, the noise prevention materials can include a plurality of pores having different sizes. The function of blocking and absorbing the noise is improved by reflecting or resonating a sound wave propagating through the noise prevention materials according to a resonant frequency of the pores. |
