Abstract This study aimed to understand the correlation between standard impact sound sources and real impact sources in lightweight floor structures. Six real impact sources (adult walking, child running, child jumping on the floor, and three objects falling) were used to be compared with standard impact sources (i.e. tapping machine and impact ball). Measurements were conducted on a lightweight timber joist floor. Impact sound pressure levels (SPLs) produced by the standard impact sources were measured on the four floor structures with or without carpet tiles. For the real impact sources, two walkers wearing socks and slippers walked at different speeds (normal and fast) along three paths, while two children ran along the three paths and jumped at four positions. Also, the SPLs generated by dropped objects were measured at five positions. Seven standardised single-number quantities (SNQs) were calculated for the tapping machine and the impact ball, while three noise ratings (LAeq, LAFmax, and LN) were also computed from the sound recordings of the real impact sources. Both the tapping machine and the impact ball showed similar frequency characteristics with the real impact sources across all the floor structures. All the SNQs for the tapping machine and the impact ball were highly correlated with the energy-based noise ratings of the adult walking and little differences were found across walking speeds and footwear. Similar tendencies were observed from other real impact sources, indicating the high correlations between the standardised SNQs of the tapping machine and the impact ball and the noise ratings.

中文翻译：

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轻型木结构中标准化和真实冲击声源的相关性

摘要 本研究旨在了解轻型地板结构中标准冲击声源与真实冲击源之间的相关性。使用六种真实冲击源（成人行走、儿童跑步、儿童在地板上跳跃、三种物体坠落）与标准冲击源（即敲击机和冲击球）进行比较。测量是在轻质木托梁地板上进行的。标准冲击源产生的冲击声压级 (SPL) 是在有或没有地毯块的四个地板结构上测量的。对于真实的撞击源，两个穿着袜子和拖鞋的步行者沿着三个路径以不同的速度（正常和快速）行走，而两个孩子沿着三个路径奔跑并在四个位置跳跃。此外，在五个位置测量了由掉落物体产生的 SPL。计算了攻丝机和冲击球的七个标准化单数数量 (SNQ)，同时还根据真实冲击源的录音计算了三个噪声等级（LAeq、LAFmax 和 LN）。攻丝机和冲击球都显示出与所有地板结构的真实冲击源相似的频率特性。敲击机和冲击球的所有 SNQ 与成人步行的基于能量的噪声等级高度相关，并且在步行速度和鞋类之间几乎没有差异。从其他实际冲击源中观察到类似趋势，表明攻丝机和冲击球的标准化 SNQ 与噪声等级之间存在高度相关性。