A new metric to quantify and evaluate low frequency impact noise
نویسندگان
چکیده
Low frequency footfall noise ("thudding") is a common source of complaints in lightweight (timber) joistframed multifamily projects. Previous work by the authors has indicated that the low frequency impact sound pressure levels (LFISPL) from a standard ISO tapping machine are highly correlated with occupant reaction. It remains to translate the raw LFISPL data into a useful single number metric that maintains the high correlation with subjective reaction, provides adequate dynamic range to distinguish the performance of different assemblies, and is conveniently scaled. This paper introduces Low-frequency Impact Rating or LIR, a new metric to quantify and evaluate low frequency impact noise.
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