Acoustical Modelling of the Double Aluminium Plate System by the Use of the Sea Method

The analysis aimed at determining the appropriate acoustic model of the wall partition which consists of two thin plates separated by a thin spatial interior acoustic cavity. The partition separates two adjacent 3D acoustic cavities: the transmitter and receiver rooms. In the paper two way of modeling of such a structure are presented. In the first case the interior cavity and the plates are considered as a separate subsystem while in the second case for those elements a double wall model is assumed. The result of SEA method prediction are compared to the 'in situ' measurements