Anomalous Reflection of Acoustic Waves in Air with Metasurfaces at Low Frequency
An acoustic metasurface made of a composite structure of cavity and membrane is proposed and numerically investigated. The target frequency is in the low frequency regime (570 Hz). The unit cells, which provide precise local phase modulation, are rather thin with thickness in the order around 1/5 of...
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| Format: | Article |
| Language: | English |
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Hindawi Limited
2018-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2018/5452071 |