Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 21, Issue 17, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/17/175704
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Funding
- Korea Science and Engineering Foundation [KOSEF R01-2006-00010083-0]
- National Research Foundation of Korea [R01-2006-000-10083-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.
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