Anomalous Reflection of Acoustic Waves in Air with Metasurfaces at Low Frequency

Chen, Huaijun

doi:10.1155/2018/5452071

Cited by 4 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pentamode acoustic metasurface can further compensate for the narrow-band limitations of traditional metasurfaces [5,6]. So far, researchers have achieved some sound field modulation works through the use of various structural designs such as Helmholtz resonators, coiled channels, mazes, and cavities [7][8][9][10][11][12][13]. Also, the researchers have utilized combinations of different materials, such as a combination of water and silicone rubber or polyurethane composites, to achieve the goal of reflective sound field modulation [14,15], other researchers use bottom-up inversion optimization algorithms to design metasurfaces [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Research on local sound field intensity control technique in metasurface based on deep neural networks

Zhao,

Lv,

Huang

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

The use of tunable metasurface technology to realize the underwater tracking function of submarines, which is one of the hotspots and difficulties in submarine design. The structure-to-sound-field metasurface design approach is a highly iterative process based on trial and error. The process is cumbersome and inefficient. Therefore, an inverse design method was proposed based on parallel deep neural networks. The method took the global and local target sound field feature information as input and the metasurface physical structure parameters as output. The deep neural network was trained using a kernel loss function based on a radial basis kernel function, which established an inverse mapping relationship between the desired sound field to the metasurface physical structure parameters. Finally, the sound field intensity modulation at a localized target range was achieved. The results indicated that within the regulated target range, this method achieved an average prediction error of less than 5 dB for 92.9% of the sample data.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on local sound field intensity control technique in metasurface based on deep neural networks

Zhao,

Lv,

Huang

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…With the advantage of ultrathin and lightweight compact structure, the acoustic metasurface has also attracted broad attention in the past decade [5][6][7][8][9][10]. By intriguingly designing the functional units, multiple functionalities can be realized, such as abnormal reflection [11,12], negative refraction [13,14], beam focusing [15], vortex sources and perfect absorption [16][17][18][19], and self-bending beams [20]. Li et al [21] proposed the ultrathin planar acoustic metasurfaces with the phase shifts spanning over a full 2π range to realize the reflected wave manipulation, which expanded metasurfaces from the optics to the regime of acoustics.…”

Section: Introductionmentioning

confidence: 99%

Underwater Transmitted Wavefront Manipulation Based on Bubble-Arrayed Acoustic Metasurfaces

Lin²,

Zeng³

et al. 2022

Front. Phys.

View full text Add to dashboard Cite

Manipulating underwater acoustic waves along the prescribed trajectory has great potential for various applications. Traditional metasurfaces for underwater acoustic modulation usually have complex structural designs and are complicated to manufacture. Here, we propose a simple strategy of embedding air bubbles of different sizes inside the polymer to freely manipulate the transmitted underwater acoustic wavefields. The transmitted phase shift covers the entire 2π range by adjusting the diameter of the bubbles. Utilizing the air-bubble array with precisely designed phase profiles, the abnormal refraction, self-bending beams, and bottle beams are univocally demonstrated based on the generalized Snell’s law. Our study can be used for designing waterborne metasurfaces with simple structures to freely manipulate the transmitted wavefronts and inspire lots of applications for underwater explorations.

show abstract

“…This reduced thickness is often desirable for a metamaterial as it allows its applicability in a broader range of real applications, hence there is a great interest in research and development of metasurfaces. The most interesting designs that can be found in literature present metasurfaces engineered to show peculiar behaviours like arbitrarily-shaped virtual surfaces to modify the local reflection angle [16][17][18], or to obtain anomalous transmission for lens-like behaviors or even to transform the propagation pattern from spherical to plane or surface waves [19,20].…”

Section: Introductionmentioning

confidence: 99%

Steering of Acoustic Reflection from Metasurfaces through Numerical Optimization

Palma

Centracchio

Burghignoli

et al. 2019

25th AIAA/CEAS Aeroacoustics Conference

View full text Add to dashboard Cite

Space-coiling metamaterials that exploit the so-called generalized Snell's law are suitable for the subwavelength manipulation of acoustic waves, leading to extraordinary refracting and reflecting metasurfaces. Typically, space-coiling metasurfaces are characterized by a narrow operating range in frequency due to the intrinsic connection between the design wavelength and the characteristic dimensions of the metasurface. The main goal of the present work is to design a broadband and modular space-coiling based metasurface, extending the range of frequency where the effective metabehaviour is achieved. The metasurface building set is composed by eight different unit cells, each introducing a tailored phase shift in the field, that can be combined side by side to produce the desired acoustic effect. The design parameters of each cell are selected as the result of an optimization process that minimizes the dependency on the operating frequency of the metabehaviour, keeping the overall thickness below a quarter of the design wavelength. Significant results are obtained for benchmark problems.

show abstract

Anomalous Reflection of Acoustic Waves in Air with Metasurfaces at Low Frequency

Cited by 4 publications

References 38 publications

Research on local sound field intensity control technique in metasurface based on deep neural networks

Research on local sound field intensity control technique in metasurface based on deep neural networks

Underwater Transmitted Wavefront Manipulation Based on Bubble-Arrayed Acoustic Metasurfaces

Steering of Acoustic Reflection from Metasurfaces through Numerical Optimization

Contact Info

Product

Resources

About