In recent years, increasing attention has been paid to the impacts of environmental noises
on living creatures as well as the accuracy and stability of precise instruments. Due to …

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

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

Recent progress in minimizing sound absorbers is driven by their great scientific
significance and engineering value; however, compact devices for low-frequency sound are …

The variable noise spectrum for many actual application scenarios requires a sound
absorber to adapt to this variation. An adjustable sound absorber of multiple parallel …

A tube-block structure is proposed to realize tunable elastic wave transmission and
resonance, consisting of periodically aligned circular tubes sandwiched and joined by two …

Environmental noise, mostly related to human activities, has an immense impact on public
health. The development of noise reduction technologies is paramount in addressing this …

Herein, we propose a type of dual-layered piezoelectric acoustic metamaterials (D-PAM)
integrating mechanical and electronic components for custom-shaping sound scattering …

Compared to passive acoustic metamaterials, tunable metamaterials offer possibility of
acoustic characteristic modulation via mechanical control system, magnetic or electric field …