Low-frequency sound absorption of hybrid absorber based on micro-perforated panel and coiled-up channels
By Fei Wu, Yong Xiao, Dianlong Yu, Honggang Zhao, Yang Wang, Jihong Wen. Applied Physics Letters, 2019
213 citations recorded by the source corpus.
We propose a hybrid acoustic metamaterial as a super absorber for a relatively broadband low-frequency sound based on a simple construction with deep-subwavelength thickness (5 cm). The hybrid metamaterial absorber is carefully designed and constructed based on a microperforated panel (MPP) and coiled-up Fabry–Perot channels. It is demonstrated analytically, numerically, and experimentally that over 99% of acoustic absorption could be achieved at a resonance frequency (<500 Hz) with the working wavelength about 30 times larger than its total thickness. It is revealed that the superior absorption is mainly caused by the friction losses of acoustic wave energy in the MPP. The frequency of the absorption peak could be tuned by adjusting the geometry parameters of the MPP and the channel folding numbers. The relative absorption bandwidth could also be tuned flexibly (up to 82%) with a fixed deep-subwavelength thickness (5 cm). The absorber has wide potential applications in noise control engineering due to its deep-subwavelength thickness, relatively broad bandwidth, and easy fabrication.
Subfields: Automotive Engineering, Biomedical Engineering, Speech and Hearing
View Paper: https://www.semanticscholar.org/paper/765e92d6d00b5ea6aa93b701f6fb6b5765a93873
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Biomedical Engineering
Citations in the corpus
- Ultra-broadband acoustic absorption of a thin microperforated panel metamaterial with multi-order resonance (2020, background): “[20] designed a hybrid sound-absorbing metamaterial based on a microperforated panel (MPP) and coiled-up FP cavities, and by integrating two different cells, an near-perfect absorption band within 355 Hz and 470 Hz was achieved under a thickness of 5 cm.”
- A Review of Acoustic Metamaterials and Phononic Crystals (2020, methodology): “[57] proposed a hybrid acoustic metamaterial composed of micro-perforated plates (MPP) and curled Fabry-Perot (FP) channels (see Figures 16 and 17), and found that the material works at a frequency greater than 30 times the total thickness.”