공동주택 바닥충격음 전이체 종류에 따른 충격음 감소효과

Abstract

Recently, The floor impact sound in apartment buildings has became a serious problem contrary to users' various needs for comfortable residential environments in an korean ON-DOL heating system, and the floor impact sound from upper floor specially such as children's play and sound of piano etc. causes noise problem to the downstair neighbors. According to the recent research data, it is said that the most dissatisfactory problem of apartment buildings is the floor impact sound. The floor impact sound that was occurred when impact directly breaks on concrete surface is transferred easily in near houses because of concrete property for lack of structure vibration decrement. However, there are many difficult points to solve fundamentally the problem as synthetically consider to property of floor structure, economic condition, the level of users' subjective needs in apartment buildings. The purpose of this study is to examine the effect on reduction of floor impact sound according to the sort of sound bridge materials in apartment buildings and to present the sample construct in apartment job site as the subject to sound isolation materials to improve the insulation performance for the floor impact sound of upper floor. The results of this study are as follow. (1) In every receiving rooms, lightweight impact sound was satisfied with grade 3∼4 and heavyweight impact sound was satisfied with grade 2∼3 in impact sound level. (2) In the case of lightweight impact sound, it has difference measure of 1～4dB according to the sort of sound bridge materials, on the contrary heavyweight impact sound has little difference. To improve the insulation effect for heavyweight impact sound, it is important to increase concrete slab thickness and the structural stiffness of concrete slab, and to development the better insulation materials. (3) Considering receiving rooms on floor impact points, the largest lightweight impact sound come out in directly under point and the difference of impact sound in receiving rooms according to the sort of sound bridge materials come out greatly. On the contrary heavyweight impact sound is about the same in all receiving rooms, it has the higher measure of 4～5dB in the central part than in the edge of concrete slabs.