The growing challenges on fuel economy improvement and greenhouse gas emission
control have become the driving force for automakers to produce lightweight automobiles …

In order to improve and broaden the sound absorption performance of porous materials with
low flow resistance, this study proposes the composite meta-porous structure embedded …

According to the mass law, a dense and thick soundproofing material is generally used to
block low-frequency sounds. However, lightweight thin soundproofing materials in the form …

We investigate the complex band structure and forced response of flexural waves
propagating in an elastic metamaterial thick plate. Mindlin-Reissner thick plate theory is …

While acoustic black holes (ABHs) are well-known inefficient at low frequencies. However,
attaching periodic local resonators to form a metamaterial ABH (MMABH) plate could be …

A new type of the elastic metamaterial beam with X-shaped local resonators is designed and
the vibration attenuation property of the proposed structure is investigated by the spectral …

To address the challenge of suppressing extremely-low frequency vibration and noise in
precision instruments and equipment, a novel non-contact metamaterial beams is proposed …

In this study, we propose a new reconfigurable hexagonal-shaped Helmholtz resonator with
a slit in each side. Numerical and experimental investigation of a single unit cell and the …

This paper combines negative capacitance (NC) with inductance (L) to enlarge low-
frequency bandgap width in locally resonant piezoelectric metamaterials. The studied …

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