# FEM acoustics of a simplified compartment model II

This is an example of a simplified compartment model with tetrahedal elements. It is shown how to set up a model for frequency domain FEM acoustics with *FREQUENCY_DOMAIN_ACOUSTIC_FEM and how to post-process with *DATABASE_FREQUENCY_BINARY_D3ACS. Results can be compared with the example ''BEM acoustics of a simplified compartment model'' and ''FEM acoustics of a simplified compartment model I''. Example 9.2 from LS-Dyna training class NVH, Fatigue and Frequency Domain Analysis with LS-DYNA by Yun Huang.