Use the Impedance node to specify a normal specific impedance Zn on a boundary. Add this node from the Mechanical Conditions submenu. The condition has a user defined option for specifying the impedance.

Specify the Specific impedance Zn (SI unit: Pa·s/m). The default value is the characteristic specific impedance of the medium tabm.rho0*tabm.c.

To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog.

To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog. See Suppressing Constraints on Lower Dimensions for details.