| Keywords |
Floor impact sound ; Sound insulation material ; Dynamic stiffness ; Loss factor |
| Abstract |
As the fundamental study for the development of floor impact sound reduction materials, floor impact sound insulation materials were classified into 5 types and their dynamic properties were measured by Korean Industrial Standard : KS F 2868. The results show that most of specimen were stabilized before 2 hours at dynamic stiffness measurement and constant characteristics were sustained at the materials of polyethylene and polyester regardless of loading time. Dynamic properties were influenced by density, thickness and design shaft of materials, and the relationship between the dynamic stiffness and the loss factor was not found. Finally, the dynamic properties for floor impact sound insulation materials of 5 types were suggested. |