Reduction of Floor Impact Sound by Applying Sound Absorbing Material and Changing Slab Structure

Floor impact sound is a major source of noise in apartment buildings. Floating floor structures using resilient materials are used for floor impact sound reduction. And a method of suppressing the occurrence of vibration by increasing the concrete slab thickness is also applied. The increase of the slab thickness has a limitation because it increases the total building load. Therefore, this study confirmed the floor impact sound reduction performance of the bubble deck slab applied to reduce the slab load. Also, the floor impact sound reduction performance when the sound absorbing material was applied to the lower floor ceiling was also examined. As a result of measurement, the bubble deck slab has a floor impact sound similar to that of a solid slab, and the floor impact sound level is lowered by using a ceiling sound absorption material.