Despite the emergence of acoustic metamaterials with superior sound absorption and
transmission loss, their adoption for building sound insulation has been limited. Sound …

The traditional sound absorption problem has not been completely resolved over the last
200 years. At every stage, its research has changed depending on practical requirements …

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 …

A novel type of tubular structure has been proposed in this paper, which is the first tubular
structure with auxeticity in the wall thickness as well as in the radial direction. This tubular …

The conflict between the acoustical performance and ventilation efficiency in conventional
noise barriers limits their application potentials in several settings. To address this …

High-efficiency absorption of low-frequency sounds (< 1000 Hz) while maintaining a free
flow of fluids remains a significant challenge in acoustical engineering due to the rigid trade …

Resolving the trade-off problem between wave obstructing and flow transport is an intriguing
but challenging task that may find potential applications in many noise control scenarios …

We present an ultra-broadband acoustic metamaterial with inhomogeneous high-order
Fabry–Pérot (FP) resonances that achieves near-perfect continuous absorption in the range …

Noise mitigation of stage machinery can be quite demanding and requires innovative
solutions. In this work, an acoustic metamaterial capsule is proposed to reduce the noise …

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 …