Anomalous refraction of airborne sound through ultrathin metasurfaces
By K. Tang, Chunyin Qiu, M. Ke, Jiuyang Lu, Yangtao Ye, Zhengyou Liu. Scientific Reports, 2014
328 citations recorded by the source corpus.
Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the propagation of sound. However, the practical applications, e.g. for audible sound with large wavelengths, are frequently hampered by the issue of device thickness. Here we present an effective design of metasurface structures that can deflect the transmitted airborne sound in an anomalous way. This flat lens, made of spatially varied coiling-slit subunits, has a thickness of deep subwavelength. By elaborately optimizing its microstructures, the proposed lens exhibits high performance in steering sound wavefronts. Good agreement has been demonstrated experimentally by a sample around the frequency 2.55 kHz, incident with a Gaussian beam at normal or oblique incidence. This study may open new avenues for numerous daily life applications, such as controlling indoor sound effects by decorating rooms with light metasurface walls.
Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Speech and Hearing
View Paper: https://www.semanticscholar.org/paper/34bcb72d626ded92852d8cc7f2aecb3ec31224ec
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In Biomedical Engineering
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Acoustic metasurfaces for scattering-free anomalous reflection and refraction (2017, methodology): “For the design of unit cells, different topologies have been used, including space-colling structures [9], slits filled with different density materials [10], or straight pipes with Helmholtz resonators in series [11,12].”