  Bubble-based metamaterials have been extensively studied both theoretically
and experimentally thanks to their simple geometry and their ability to
manipulate acoustic waves. The latter is partly dependent on the structural
characteristics of the metamaterial and partly dependent on the incident
acoustic wave. Initially, the selection of specific structural characteristics
is explained by presenting the Fourier transformations of the reflected waves
for different arrangements of a bubbly meta-screen subject to Gaussian
excitation. Next, our numerical study focuses on the changes induced to the
response of a bubbly meta-screen, subject to different excitation pulses. For
complex-frequency excitation the bubbles delay to return to their equilibrium
position for a couple of moments, hence the energy is stored in the system
during those moments. This research provides a new strategy to actively control
the response of a bubbly meta-screen and seeks to inspire future studies
towards further optimization of the incident pulse based on the functionalities
in need.
