  We present a proof of concept design for a structured square cloak enclosing
a void in an elastic lattice, subjected to flexural vibrations. In addition to
the theoretical design, we fabricate and experimentally test an elastic
invisibility cloak for flexural waves in a mechanical lattice. Further
verification and modelling is performed numerically through finite element
simulations. The primary advantage of our square lattice cloak, over other
designs, is the straightforward implementation and the ease of construction.
The elastic lattice cloak shows an impressive efficiency within the predicted
frequency range of 100-250Hz.
