Low-frequency sound absorption of hybrid absorber based on micro-perforated panel and coiled-up channels

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 coil...

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Veröffentlicht in:Applied physics letters 2019-04, Vol.114 (15)
Hauptverfasser: Wu, Fei, Xiao, Yong, Yu, Dianlong, Zhao, Honggang, Wang, Yang, Wen, Jihong
Format: Artikel
Sprache:eng
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Zusammenfassung: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–Pérot channels. It is demonstrated analytically, numerically, and experimentally that over 99% of acoustic absorption could be achieved at a resonance frequency (
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5090355