For quasi-static formulations in electromagnetics, it is used, for example, to compute the impedance versus frequency. For acoustics and electromagnetic wave propagation, it is used to compute the transmission and reflection versus frequency. A Frequency Domain study accounts for the effects of all eigenmodes that are properly resolved by the mesh and how they couple with the applied loads or excitations. The output of a Frequency Domain study is typically displayed as a transfer function, for example, magnitude or phase of deformation, sound pressure, impedance, or scattering parameters versus frequency.