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'Ghost tunnels' guide sound waves in one direction while staying invisible to others
2 Articles
2 Articles
'Ghost tunnels' guide sound waves in one direction while staying invisible to others
Acoustic metamaterials are a fast-evolving family of materials which manipulate sound waves in ever more advanced ways. Now, a team led by Changqing Xu at Nanjing Normal University in China has engineered an acoustic metamaterial, a "ghost tunnel": a structure which acts as a near-perfect waveguide for sound entering through its ends, while being essentially invisible to waves incident on its sides. The results, published in Physical Review Lett…
Acoustic metamaterials are a family of rapidly evolving materials that manipulate sound waves in an increasingly advanced way. Today, a team led by Changqing Xu of the Normal University of Nanjing in China has designed an acoustic metamaterial, a "phantom tunnel": a structure that acts as a waveguide almost [...]
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