Composite acoustic medium with simultaneously negative density and modulus

Sam Hyeo Lee, Chul Ko Kim, Choon Mah Park, Yong Mu Seo, Zhi Gu Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We fabricated an acoustic composite structure consisting of a periodic array of interspaced membranes and side holes. This medium exhibited negative phase velocity and double negativity for frequencies below a cutoff frequency. Above the cutoff frequency lies a stop band where the medium is single negative and waves are of evanescent type. The double negative spectral range in this structure is very wide, which can not be understood in terms of the resonance of the unit cell elements. We present physical principles for this special type of double negative spectral range.

Original languageEnglish
Title of host publication17th International Congress on Sound and Vibration 2010, ICSV 2010
Pages170-177
Number of pages8
Publication statusPublished - 2010
Event17th International Congress on Sound and Vibration 2010, ICSV 2010 - Cairo, Egypt
Duration: 2010 Jul 182010 Jul 22

Publication series

Name17th International Congress on Sound and Vibration 2010, ICSV 2010
Volume1

Other

Other17th International Congress on Sound and Vibration 2010, ICSV 2010
CountryEgypt
CityCairo
Period10/7/1810/7/22

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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  • Cite this

    Lee, S. H., Kim, C. K., Park, C. M., Seo, Y. M., & Wang, Z. G. (2010). Composite acoustic medium with simultaneously negative density and modulus. In 17th International Congress on Sound and Vibration 2010, ICSV 2010 (pp. 170-177). (17th International Congress on Sound and Vibration 2010, ICSV 2010; Vol. 1).