Low-frequency sound absorbing metasurface using multilayer split resonators

Shota Takasugi, Keita Watanabe, Masaaki Misawa, Kenji Tsuruta

Research output: Contribution to journalArticlepeer-review

Abstract

Among the acoustic metasurfaces that can control the propagation of sound waves with the structure far thinner than the wavelength at the operating frequency, the split tube structure has shown its effectiveness in the lower frequency band. Here we focus on multiply layered split tubes to broaden the absorption spectrum. By numerical analysis, we show up-to six-layer structure possessing wideband (1-1000 Hz) sound absorption. The absorbing peaks in the frequency band below 1000 Hz are shown to be multiplexed not only by simple superposition of vibrational modes of each layer, but also by hybridization of the modes indicating collective motion of tubes.

Original languageEnglish
Article numberabe2e5
JournalJapanese Journal of Applied Physics
Volume60
Issue numberSD
DOIs
Publication statusPublished - Jul 2021

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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