Acoustic metamaterial panels for sound attenuation in the 50-1000 Hz regime

Z. Yang*, H. M. Dai, N. H. Chan, G. C. Ma, Ping Sheng

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

504 Citations (Scopus)

Abstract

We show experimentally that thin membrane-type acoustic metamaterials can serve as a total reflection nodal surface at certain frequencies. The small decay length of the evanescent waves at these frequencies implies that several membrane panels can be stacked to achieve broad-frequency effectiveness. We report the realization of acoustic metamaterial panels with thickness ≤15 mm and weight ≤3 kg/m2 demonstrating 19.5 dB of internal sound transmission loss (STL) at around 200 Hz, and stacked panels with thickness ≤60 mm and weight ≤15 kg/m2 demonstrating an average STL of >40 dB over a broad range from 50 to 1000 Hz.

Original languageEnglish
Article number041906
Number of pages3
JournalApplied Physics Letters
Volume96
Issue number4
DOIs
Publication statusPublished - 25 Jan 2010

Scopus Subject Areas

  • Physics and Astronomy (miscellaneous)

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