| 摘要 |
PURPOSE: A soundproofing plate is provided to improve soundproofing performance by charging plastic foamed soundproofing materials in 50% or the whole of unit cavities having a triangular section without a space. CONSTITUTION: A soundproofing plate(10) comprises two surface materials(11a,11b) and connecting members(12a,12b,12c). The two surface materials are arranged at a constant space. The connecting members are formed into one boy between the surface materials so that a plurality of unit cavities(C1,C2-Cn) having a triangular section are formed. Vertical angles(a) and basic angles(φ) of both sides of the unit cavities are continued by turns. The vertical angle is 75-85°and the basic angles are 47.5-52.5°. |
