Broadband sound sink/absorber via a structure with deep sub-wavelength thickness is of
great and continuing interest in physics and engineering communities. An intuitive technique …

Acoustic perfect absorption via a structure with deep subwavelength thickness is of great
and continuing interest in research and engineering. This study analytically and …

In this work, we analytically and experimentally present perfect acoustic absorbers via spiral
metasurfaces composed of coiled channels and embedded apertures. Perfect absorption …

Sound absorbing materials are used in buildings to dissipate sound energy into heat using
viscous and thermal processes. Sound absorbers increase the transmission loss of walls …

Sound-absorbing materials (SAMs) have attracted significant interest for more than a century
owing to their rich physical properties and extensive potential in acoustic engineering. This …

Acoustic absorbers based on resonant cavities or porous materials have been extensively
investigated for developing acoustic liners but still suffer from narrow working frequency …

We present an asymmetric absorber at an exceptional point (EP) with a compact
configuration and deep-subwavelength thickness. Unlike conventional side-branched sound …

Microperforated panels are light, clean and tunable sound absorbers, which fundamentals
were already established in the previous century. They consist of a distribution of minute …

In this paper, the low-frequency sound-absorbing performance of parallel-arranged micro-
perforated plates (MPPs) is investigated, where elastic MPPs with different MPP parameters …

Owing to the pronounced wave-matter interaction at resonance, meta-absorbers show
impressive potentials for eliminating low-frequency sound even at thicknesses far below the …