This study proposes an ultra-thin sound-absorbing metasurface for low-frequency sound
absorption, which is composed of resonators with an embedded spiral neck and a coiling-up …

Acoustic metamaterials with deep-subwavelength thickness have aroused increasing
interests for potential applications in low-frequency sound and vibration control. Most …

Achieving broadband sound absorption in low-frequency ranges using thin acoustic
materials has been a long-standing and challenging problem in acoustics. When using the …

We propose a thin-walled mesoscopic hybrid slit-resonator metamaterial with excellent
broadband sound absorption performance through developing an integrated material …

A planar swirl-shaped Acoustic Black Hole (ABH) absorber is proposed and investigated in
this paper. In addition to the well-known bending wave retarding phenomena, the speed of …

Current sound-absorbing materials have fixed absorption spectra due to unalterable local
resonance properties, which limit their application potential in many noise control scenarios …

A compact structure comprising the gradient perforated porous material and the coiled-up
channel (GPPC) is proposed. The sound absorption performance is investigated by a …

In this study, a novel compact design for an acoustic metasurface containing coplanar arch-
like channels (ALC) is proposed. The ALC is squeezed within a compact disk-shaped …

Integrating soft components into acoustic metamaterials is an extremely promising way to
enhance their adjustability and reconfigurability. Herein, we report a type of space-coiled …

To reduce their space requirement, quarter wavelength resonators are coiled up into a spiral
to have the shape of a flat cylinder. The practical implementation of these resonators is …