Experimental Study on Practical Control of Floor Impact Sound for Nursery Schools

Presently, in metropolitan areas in Japan, there are many problems of waiting children who did not enter nursery centers due to the number of people. In Japan, in April 2015, with the enforcement of "The Comprehensive Support System for Children and Child-rearing", small-scale childcare services became licensed nursery centers. With this system, it became possible to open even with a capacity of 6 to 19 people, and by having small-scale childcare services as licensed nursery centers, it was possible to open a nursery center using a vacant room of apartment or building. Based on the above background, the floor impact sound for children is an important theme in apartments and buildings. Also, not only in apartments and buildings but also in common two-story detached nursery centers, the problem of floor impact sound is important. In this study, we experimentally investigated the countermeasure method of the heavy-weight floor impact sound for the existing nursery centers. As a countermeasure, we installed a commercial product with the storage furniture with tatami on the floor. From the standpoint of vibration isolation and sound insulation, we improved the storage furniture with tatami and improved heavy-weight floor impact sound insulation performance.