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Description
Within an acoustics-oriented design process, virtual prototypes play a crucial role in early design stages by enabling, for instance, the prediction of building acoustics. In this context, the sound transmission loss is an important quantity which can be measured in building acoustics test facilities according to DIN EN ISO 10140. This contribution presents a simple benchmark finite element model of such a test facility to measure the sound transmission loss of single- and double-leaf walls with and without insulation. In doing so, a simulation chain was used combining SALOME 9.14 for the mesh creation as well as the institute’s in-house research code elPaSo for the matrix assembly and solving procedure. As a preliminary step, the simulation chain was verified using the commercial software COMOSL 6.3 considering a small-scale test facility model. Subsequently, a finite-element model of the large-scale test facility was developed using a frequency- and domain-specific discretisation approach. Finally, the sound transmission loss of the three test specimens was determined in one-third-octave bands from 8 Hz to 630 Hz; the insulated double-leaf wall exhibited close agreement with the theoretical transmission-loss curve reported in the literature.