Three-Dimensional Single-Port Labyrinthine Acoustic Metamaterial: Perfect Absorption with Large Bandwidth and Tunability

By Chi Zhang, Xinhua Hu. 2016

283 citations recorded by the source corpus.

In this paper, we report on the design, fabrication, and experimental characterization of a 3D single-port labyrinthine acoustic metamaterial. By using curled perforations with one end closed and with appropriate loss inside, the proposed metamaterial can perfectly absorb airborne sounds in a low frequency band. Both the position and width of the band can be tuned flexibly. A tradeoff is uncovered between the relative absorption bandwidth and thickness of the metamaterial. When the relative absorption bandwidth is as high as 51%, the requirement of deep subwavelength thickness (0.07{\lambda}) can still be satisfied.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Signal Processing

View Paper: https://www.semanticscholar.org/paper/52dbd903c02ca12652acc126961826d141779995

Citations in the corpus

• Ultra-broadband acoustic absorption of a thin microperforated panel metamaterial with multi-order resonance (2020, unknown): “[17] reported an 18 cm-thick structure, comprised of 6 coiled FP cavities, which achieved near-perfect absorption performance within 100 Hz–200 Hz.”
• Extreme low-frequency ultrathin acoustic absorbing metasurface (2019, unknown): “ubwavelength sized acoustic devices for low-frequency applications such as negative refraction [13], deep subwavelength focusing/imaging [14], cloaking[15], perfect absorbers with ultrathin thickness [12,14, 15, 16, 17, 18, 19, 20, 21, 22] etc. In related researches, perfect metasurface absorbers ha”