Satellites and space equipment are exposed to diffuse
acoustic fields during the launch process. The use
of adequate techniques to model the response to the
acoustic loads is a fundamental task during the design
and verification phases. Considering the modal density
of each element is necessary to identify the correct
methodology. In this report selection criteria are
presented in order to choose the correct modelling
technique depending on the frequency ranges. A
model satellite’s response to acoustic loads is presented,
determining the modal densities of each component in
different frequency ranges. The paper proposes to select
the mathematical method in each modal density range
and the differences in the response estimation due to the
different used techniques. In addition, the methodologies
to analyse the intermediate range of the system are
discussed. The results are compared with experimental
testing data obtained in an experimental modal test
