Cross-laminated timber (CLT) is an increasingly popular building material due to its sustainability and structural performance. This study investigates the impact sound of CLT floor panels or square timber CLT, focusing on both lightweight and heavyweight impact sounds. The novelty lies in comparing four-floor coverings with different CLT panel configurations, including vinyl board attached to CLT floor panels, vinyl board with CLT-inserted air gap with gypsum board, and gypsum board with an air gap from CLT floor panels. The results demonstrate that vinyl board with CLT-inserted air gap with gypsum board effectively reduces the lightweight impact sound by 15.86 dB and heavyweight impact sound by 7.01 dB at 250 Hz. Moreover, t-test results exhibited a significant variation (p = ≤ 0.005) for lightweight impact sound and a non-significant variation (p = 0.092) for heavyweight impact sound. Additionally, adding an air gap with a gypsum board beneath CLT floors can reduce both impact sounds. This information can be helpful for architects and designers aiming to improve acoustic performance in a building.

交叉层压木材 (CLT) 因其可持续性和结构性能而成为越来越受欢迎的建筑材料。本研究调查了 CLT 地板或方木 CLT 的撞击声，重点关注轻质和重型撞击声。新颖之处在于比较具有不同 CLT 面板配置的四地板覆盖物，包括连接到 CLT 地板面板的乙烯基板、带有 CLT 插入气隙的乙烯基板与石膏板，以及来自 CLT 地板面板的带有气隙的石膏板。结果表明，在 250 Hz 时，插入 CLT 气隙的乙烯基板与石膏板可有效降低轻量级冲击声 15.86 dB，重量级冲击声降低 7.01 dB。此外，t 检验结果显示，轻量级冲击声存在显着变化 (p = ≤ 0.005)，而重量级冲击声则表现出不显着变化 (p = 0.092)。此外，在 CLT 地板下方添加石膏板气隙可以减少撞击声。这些信息对于旨在提高建筑物声学性能的建筑师和设计师很有帮助。