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 …

In this research, a design method for triply periodic minimal surface (TPMS) structures with a
high specific strength for broadband sound absorption is proposed. The graded TPMS …

Proposals for new absorber designs for broadband sound absorption are of great interest
due to their wide applicability in sound energy control. In this sense, the behavior of an …

An assembly of additively-manufactured modules to form two-dimensional networks of
labyrinthine slits results in a sound absorber with extremely high tortuosity and thereby a …

Studies on acoustic metamaterials (AMM) with coiled spaces as a solution for low-medium
frequency sound absorption are regularly presented. However, the influence of panel …

Proposed here is a metastructure based on a micro-perforated panel and an impedance-
matching coiled-up cavity with continuously variable cross section, which achieves perfect …

Railway noise poses a significant environmental challenge, prompting the need for effective
mitigation strategies. In response, noise barriers are often employed to reduce noise near …

Porous materials with rigid backing are widely used as sound absorbers with good
absorption performances particularly at mid and high frequencies, but poor performances at …

The low frequency peaks in the absorption spectra of layers of conventional porous
materials correspond to quarter wavelength resonances and the peak frequencies are …