Light-weight Impact Sound Evaluation of CLT Wooden Building Floors

This study evaluated the lightweight impact sound of CLT (Cross Laminated Timber) made of plywood and square timber produced from domestic small-diameter larch wood. According to KS F 2810-1, the light-weight impact sound blocking performance of the CLT was evaluated by excitation with a tapping machine on the second floor and sound collection with a microphone from the lower floor. As a result, the light impact sound was 85 dB. The light impact sound blocking performance was poor, and additional stud-ies are needed to improve the lightweight impact sound of CLT.