In the past two decades, acoustic metamaterials have garnered much attention owing to
their unique functional characteristics, which are difficult to find in naturally available …

Acoustic metamaterials, artificial composite structures with exotic material properties used to
control elastic waves, have become a new frontier in physics, materials science, engineering …

Designing multichannel narrow passband filters working at specified frequencies is very
challenging because a narrow defect band with non-zero group velocity must be achieved …

Low-frequency and broadband noise reductions have always been a major industrial
concern, as they pose a significant challenge. Although acoustic metamaterials are …

Most existing phononic crystals (PnCs) are characterized by a single band gap, and for
crystal systems that require multiple band gaps, the method of assembling multiple …

Acoustic metamaterials (AMs) are artificially engineered composite materials, structured to
have unconventional effective properties for flexibly manipulating the wave propagation …

In this study, the wave propagation properties of lattice metamaterials with Koch fractal
structures are investigated in terms of band structures and directional wave propagation …

This work focuses on the study of composite metamaterials to be employed as possible
lightweight insulation systems for noise and vibrations. In particular, the dispersion relations …

Membrane-type acoustic metamaterials (MAMs) are lightweight and flimsy materials with
excellent low-frequency insulation performance, which breaks the limitations of the …

We constructed a three-dimensional fractal acoustic metamaterial using the combination of
zigzag channels and Menger fractal structures that had high structural symmetry and could …