| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance heavy floor impact sound insulating performance of a double floor used for a floor finishing structure in an RC house or the like. <P>SOLUTION: A substrate panel of a double floor is formed in a hollow structure with high flexural rigidity, in which a hollow part communication hole 10 for connecting between a hollow part 14 and an underfloor air layer 2 is provided for cushioning of an impactive pressure increase in the underfloor air layer. As a result, the heavy floor impact sound insulating performance is significantly improved to decrease by 10 decibels or more with respect to a slab surface. <P>COPYRIGHT: (C)2013,JPO&INPIT |
