This paper presents a frequency domain analysis of a viscoelastic based panel using the complex modulus method. A linear finite element model is developed to investigate panel behavior under displacement and force excitations, respectively. The viscoelastic material is modelled by the complex modulus method along with a four-parameter fractional order derivative model. The usage of the complex modulus method results in the complex nature of displacements and forces. Displacement and force transmissibility are evaluated by effectively handling the complex nature of the displacement and forces, respectively.