4.4. Acoustic Power Loss Results

The following acoustic power loss results are available for Coupled Field Harmonic and Harmonic Acoustics analyses.

  • Transmission Loss: This result solves for the Sound Power Level loss between the Incident Power on the Inlet Port and the Transmitted Power at Outlet Port.

  • Absorption Coefficient: This result solves for the ratio of sound energy absorbed by a given Inlet Port to incident sound energy upon the surface

  • Return Loss: This result solves for the difference between the Incident Sound Power and the Reflected Sound Power on Inlet Port.

These results use a pre-defined Input Port and/or Output Port in order to derive acoustic power quantities based on the surface loading conditions applied during the analysis.

Port definition requires that the:

  • General Miscellaneous property of the Analysis Setting be active (default).

  • Port Position property of the selected Port object be set to On Exterior Surface (default setting).

  • Port Behavior property of the Port be set to Transparent (default setting).

Refer to the PLAS command in the Mechanical APDL Command Reference for more information.