Measured steady-state deformed shapes, representing the stationary response of the plate for excitation at 0.79 kHz (below the bandgap) (a), 2.35 kHz (inside the bandgap) (b), and 5.39 kHz (above the bandgap) (c). The red circle represents the source excitation of the acoustic waves (Reprinted with permission from Ref. [397]. Copyright 2012, AIP Publishing LLC).