AES Europe 2026

One of the many applications of acoustic metamaterials is
the ability to substantially improve acoustic insulation in
the low-frequency range compared to traditional materials.
The objective of this study was to investigate a
vibroacoustic metamaterial consisting of a soft solid plane
with embedded inclusions. The analysed structure consists
of a porous layer with periodic solid elements, which
allows for enhanced insulation properties. A numerical
model considering interactions between the acoustic domain
; a solid was developed using COMSOL Multiphysics. The
influence of selected material; geometric parameters,
such as the shape of the inclusions; their placement, on
the overall effectiveness of the structure was analysed.
Based on the simulation results, a variant of the structure
was selected; used to create a prototype of the
metamaterial. The acoustic insulation of the constructed
structure was then measured in the diffuse field. The next
step is to conduct an optimization using the PSO algorithm
in order to find geometry of the structure that can achieve
the most favourable results in the selected frequency
range. The optimized structure will then be validated by
creating an additional sample; conducting another
measurement.