Abstract
The reduction of low frequency structure-borne sound transmission through floors is a highly demanding work in building construction engineering. The floating floor system with low natural frequency (FFLN) is considered as a practical method to reduce the low frequency transmission without changing structural design. An important aspect of the FFLN is how the low frequency performance is affected by the plan configuration. Researchers have questioned the differences in the low frequency behavior of the FFLN observed in various geometric configurations of the plan regarding this issue. This paper presents the full-scale experimental data for the vibroacoustic behaviors of a FFLN with different plan configurations. The experimental data are analyzed with theoretical considerations to investigate the influence of plan configuration on the low frequency impact sound response. The results of the analysis indicate that both the structural shape and dimension may affect the variation in low frequency impact sound due to differences in structural-acoustic modal coupling.
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