Abstract
The ball-void slab (B. V. S.) is a slab with the spherical void. Vibration measurements with the discrete calculation method on the floor impact sound insulation performance of ball-void slab were carried out. Four specimens of the full-scale section model were measured. One specimen was the ordinary solid slab and the other three specimens were void slab. The void was used rectangular type (one specimen) and sphere type (two specimens of 200mm and 240mm in void pitch). Through this study, it has been revealed that the ball-void slab has advantageous features on the floor impact sound insulation performance with increased void ratio of the slab.
