On effective mobilities in the prediction of structure-borne sound transmission between a source structure and a receiving structure, part II: Procedures for the estimation of mobilities

Abstract As is discussed in Part I, the structure-borne sound power transmission between multi-point, coupled structures can theoretically be described by effective mobility. The results from full scale measurements of transfer and point mobilities of compound structures show that in some cases the effective point mobility can be approximated by the ordinary point mobility. Estimation procedures for the ordinary point mobilities containing manageable expressions for engineering applications have been developed and some examples are presented. The basic reasoning behind these procedures are described. Promising agreement has been obtained with measurement results. Also, correction factors for the ordinary point mobility to obtain an approximate point mobility and their approximate frequency bounds are given. Comparison with measured effective point mobility shows good agreement.