Sound insulating device for buildings

Abstract

Because the present invention is the floor of the room which is made by laminating a porous expanded resin plastic sheet ( 2 ), a bulgy-and-hollow or undulating plate ( 3 ), and a porous expanded resin plastic sheet ( 2 ′) on a concrete slab ( 1 ), and then by plastering the surface of the expanded resin plastic sheet ( 2 ′) with mortar ( 4 ), it has the effect to improve the efficiency of sound insulation.

1 . A sound insulating device for a building, comprising: 
 a first porous expanded resin plastic sheet;    a bulgy-and-hollow plate with convex surfaces and concave surfaces;    a second porous expanded resin plastic sheet on a surface of a room of a building; and    a resilient material on the first expanded resin plastic sheet.    
     
     
         2 . The sound insulating device according to  claim 1 , wherein said resilient material is mortar.  
     
     
         3 . The sound insulating device according to  claim 1 , wherein said bulgy-and-hollow plate is a three dimensional surface.  
     
     
         4 . The sound insulating device according to  claim 1 , wherein said surface of a room of a building is a concrete slab forming a story of said building.  
     
     
         5 . A method of forming a sound insulating device for a building, comprising the steps of: 
 laminating a first porous expanded resin plastic sheet, a bulgy-and-hollow plate with convex surfaces and concave surfaces, and a second porous expanded resin plastic sheet to form a laminated structure on a surface of a room of a building; and    applying a resilient material on the first expanded resin plastic sheet.    
     
     
         6 . The method of forming a sound insulating device according to  claim 5 , wherein said applying step includes plastering mortar on the first expanded resin plastic sheet.  
     
     
         7 . The method of forming a sound insulation device according to  claim 5 , wherein said surface of said room of said building is a surface of a concrete slab of said building.