Journal
PHYSICAL REVIEW B
Volume 86, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.184302
Keywords
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Funding
- National Research Foundation [2008-0062237]
- Basic Science Research Program [2012-0002272]
- Ministry of Education, Science and Technology
- National Research Foundation of Korea [2010-0012562, 2008-0062237] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Recent theoretical studies demonstrated that waves can be steered in any desired fashion by using a suitable distribution of material parameters. However, the required parameters for acoustic transformations often surpass the ranges available from the metamaterials developed so far. We introduce a class of acoustic metamaterials based on standing waves in a tubular array and experimentally demonstrate continuous tuning of the compressibility in an unprecedentedly wide range from -8 to 6 relative to air at audio frequencies. Potential applications include the acoustic Luneburg lens and cloaking.
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