Modeling and characterizing flanking transmissions in lightweight constructions

摘要

In this paper, the problem of modeling and characterizing flanking transmissions in lightweightrnconstructions is addressed. The quantities and characterization methods used in EuropeanrnStandard EN 12-354, which is based on a first order Statistical Energy Analysis (SEA) approachrnfor predicting sound insulation in buildings, cannot be directly used when applied to lightweightrnconstructions. These limitations are mainly related to the non-uniform vibration response ofrnlightweight floors and walls, which can partly be attributed to high damping. In this paper, anrnexact analytical model of a junction is used to evaluate the accuracy of SEA. To more accuratelyrnsolve the problem of vibration transmission between highly damped plates, a simple energy flowrnmodel is proposed, which treats the direct field and the reverberant field separately.