Study of the effect of finite extent on sound transmission loss of single panel using a waveguide model

Iwan Prasetiyo , David Thompson

The sound transmission loss (STL) of a panel is often estimated using an infinite plate model. However, some discrepancies are found between these predicted results and experimental ones. One of the sources of such discrepancies corresponds to the finite extent that is naturally found in real structures. In the present study an analytical waveguide model of sound transmission is used to study the effect of finite dimensions in one direction for a panel which is long in the other dimension. The resulting model is used to investigate the effect of the finite width on the STL through a simple case of an infinite plate strip with simply supported boundary conditions. The results obtained are compared with those for the infinite plate. The resulting analytical model can also be used to provide benchmark solutions for validating numerical methods such as waveguide FE/BE. Examples of such benchmark comparisons are also provided.

Domaines: Acoustique [physics.class-ph]

Iwan Prasetiyo, David Thompson. Study of the effect of finite extent on sound transmission loss of single panel using a waveguide model. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810677⟩