Prediction of structure-born sound and secondary airborne sound by three dimensional finite element models

摘要

The FEM is a useful method to predict structure-borne sound and secondary air borne sound concerning complex transfer paths. Sometimes the FEM is criticized as a method of prediction because of its uncertain results. In our opinion the accuracy of prediction is depending on the choice of the material properties especially of the soil layer and the accuracy of the FE model. A detailed model and the right choice of the material properties in connection with suitable vibration measurements will lead to a reliable results.