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 metamaterial represents the synergism between wave physics and designed
geometric structures, aimed at novel acoustic properties. For the important functionality of …

Sound absorption is important for room acoustics and remediation of noise. Acoustic
metamaterials have recently emerged as one of the most promising platforms for sound …

Highly efficient absorption of broadband low-frequency sound with a slim subwavelength
meta-structure promises extensive applications in acoustic engineering, which remains a …

The absorption of airborne sound is still a subject of active research, and even more since
the emergence of acoustic metamaterials. Although being subwavelength, the screen …

Metalenses with high-efficiency focusing functionality and a water-flow-permeable structure
are desired in various acoustic applications, such as medical imaging and underwater …

Acoustic metasurfaces have the potential to be a promising route for the development of
compact sound-absorptive devices with ventilation capability. However, the dissipation …

Low frequency sound absorption in ventilation duct is an important technical issue. In this
study, silencer consisting of decoupled annular Helmholtz resonators (AHR) is designed to …

This work deals with wave absorption in reciprocal asymmetric scattering problem by
addressing the acoustic problem of compact absorbers for perfect unidirectional absorption …

Emerging artificial acoustically soft boundaries (ASBs) have shown great potential for
developing compact sound absorptive devices with excellent ventilation performance …