Locally resonant sonic materials

Ping Sheng*, Xixiang Zhang, Z. Liu, C. T. Chan

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

180 Scopus citations

Abstract

We have fabricated a new type of composite which displays localized sonic resonances at ∼ 350-2000 Hz with a microstructure size in the millimeter to centimeter range. Around the resonance frequencies the composite behaves as a material with effective negative elastic constants and as a total wave reflector - a 2 cm slab of this material is shown to break the conventional mass-law of sound transmission by order(s) of magnitude. When the microstructure is periodic, our composites exhibit large elastic wave band gaps at the sonic frequency range, with a lattice constant order(s) of magnitude smaller than the corresponding sonic wavelength in air. Good agreement is obtained between theory and experiment.

Original languageEnglish (US)
Pages (from-to)201-205
Number of pages5
JournalPhysica B: Condensed Matter
Volume338
Issue number1-4
DOIs
StatePublished - Oct 1 2003
EventProceedings of the Sixth International Conference on Electrica (ETOPIM 6) - Snowbird, UT, United States
Duration: Jul 15 2002Jul 19 2002

Keywords

  • Elastic wave band gaps
  • Localized resonance
  • Negative elastic constants

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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