The great progress in material science and nano-micro fabrication enables the applications
of metamaterials with well-defined and well-organized microstructures for noise reduction.
However, what intrinsic morphology of the metamaterial would result in optimum sound
absorbing efficiency remains uncertain. This work presents a microlattice metamaterial,
comprising well-defined and organized material morphology in terms of pore size and
porosity, for generating optimum sound dissipation. A compact governing equation is …