Acoustic metamaterial with negative modulus

Acoustic metamaterial with negative modulus

We present experimental and theoretical results on an acoustic metamaterial that exhibits a negative effective modulus in a frequency range from 0 to 450 Hz. A one-dimensional acoustic metamaterial with an array of side holes on a tube was fabricated. We observed that acoustic waves above 450 Hz pro...

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Veröffentlicht in:Journal of physics. Condensed matter 2009-04, Vol.21 (17), p.175704-175704
Hauptverfasser: Lee, Sam Hyeon, Park, Choon Mahn, Seo, Yong Mun, Wang, Zhi Guo, Kim, Chul Koo
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Sprache:eng
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Acoustical measurements and instrumentation
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
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container_end_page 175704
container_issue 17
container_start_page 175704
container_title Journal of physics. Condensed matter
container_volume 21
creator Lee, Sam Hyeon
Park, Choon Mahn
Seo, Yong Mun
Wang, Zhi Guo
Kim, Chul Koo
description We present experimental and theoretical results on an acoustic metamaterial that exhibits a negative effective modulus in a frequency range from 0 to 450 Hz. A one-dimensional acoustic metamaterial with an array of side holes on a tube was fabricated. We observed that acoustic waves above 450 Hz propagated well in this structure, but no sound below 450 Hz passed through. The frequency characteristics of the metamaterial has the same form as that of the permittivity in metals due to the plasma oscillation. We also provide a theory to explain the experimental results.
doi_str_mv 10.1088/0953-8984/21/17/175704
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subjects Acoustical measurements and instrumentation
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
title Acoustic metamaterial with negative modulus
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