Hybrid Metasurfaces for Perfect Transmission and Customized Manipulation of Sound Across Water–Air Interface

Advanced Science, Год журнала: 2023, Номер 10(19)

Опубликована: Апрель 20, 2023

Abstract Extreme impedance mismatch causes sound insulation at water–air interfaces, limiting numerous cross‐media applications such as ocean‐air wireless acoustic communication. Although quarter‐wave transformers can improve transmission, they are not readily available for acoustics and restricted by the fixed phase shift full transmission. Here, this limitation is broken through impedance‐matched hybrid metasurfaces assisted topology optimization. Sound transmission enhancement modulation across interface achieved independently. Compared to bare interface, it experimentally observed that average transmitted amplitude an metasurface peak frequency enhanced ≈25.9 dB, close limit of perfect 30 dB. And nearly 42 dB measured with axial focusing function. Various customized vortex beams realized promote in The physical mechanisms broadband wide‐angle incidences revealed. proposed concept has potential efficient free communication dissimilar media.

Язык: Английский

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Application of machine learning on the design of acoustic metamaterials and phonon crystals: A review

Smart Materials and Structures, Год журнала: 2024, Номер 33(7), С. 073001 - 073001

Опубликована: Май 29, 2024

Abstract This comprehensive review explores the design and applications of machine learning (ML) techniques to acoustic metamaterials (AMs) phononic crystals (PnCs), with a particular focus on deep (DL). AMs PnCs, characterized by artificially designed microstructures geometries, offer unique properties for precise control manipulation sound waves. ML, including DL, in combination traditional artificial have promoted process, enabling data-driven approaches feature identification, optimization, intelligent parameter search. ML algorithms process extensive AM data discover novel structures properties, enhancing overall performance. presents an in-depth exploration associated highlighting specific advantages, challenges potential solutions applying using techniques. By bridging engineering this paves way future breakthroughs research engineering.

Язык: Английский

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Janus Metasurface for Underwater Sound Manipulation

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 29, 2024

Abstract Bidirectional controllable propagation of waterborne sound holds significant importance in developing multifunctional underwater acoustic and mechanical devices. However, the existing metasurfaces have rarely explored bidirectional modulations. Here, a class Janus metasurface, enabling two‐faced arbitrarily asymmetric wavefront manipulations is reported. A three‐degree‐of‐freedom system facilitated by acoustic‐structure interaction proposed to introduce bianisotropic responses unit cells. Monolayer ultrathin metasurface inversely designed utilizing function‐structure integrated topology optimization framework. Distinct functionalities, including axial oblique focusing, beam splitting, diffusion, are successfully demonstrated. Underwater experiments further conducted validate concept metasurface. The good consistency between experimental simulated results confirms excellent focusing performance. opens up new dimension for designing advanced devices with manipulations.

Язык: Английский

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Underwater Scattering Exceptional Point by Metasurface with Fluid‐Solid Interaction

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Май 25, 2024

Abstract Exceptional point (EP), a special degeneracy in non‐Hermitian systems, has exhibited various distinctive wave characteristics. However, the conventional synthesis of scattering EPs acoustics is confined to rather limited methods for breaking Hermiticity, typically requiring intrinsic losses or open interfaces. Here, concept synthesizing theoretically and experimentally demonstrated by leveraging metasurface with fluid‐solid interaction (FSI) water. The incorporation FSI offers novel mechanism customize natural radiation losses. Simulations experiments consistently confirm that synthesized result extremely asymmetric patterns, even case spatially impenetrable metasurfaces. This enhanced spatial symmetry benefits from on interface nonlocal between unit cells. proposed framework, involving interplay sound fluids solids, expected up new possibilities exploring unique physics underwater acoustic applications.

Язык: Английский

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Discrete metasurface for extreme sound transmission through water-air interface

Journal of Sound and Vibration, Год журнала: 2024, Номер 575, С. 118269 - 118269

Опубликована: Янв. 16, 2024

Язык: Английский

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Dynamic Acoustic Beamshaping with Coupling‐Immune Moiré Metasurfaces

Advanced Materials, Год журнала: 2024, Номер 36(24)

Опубликована: Фев. 21, 2024

Moiré effects arising from mutually twisted metasurfaces have showcased remarkable wave manipulation capabilities, unveiling tantalizing emerging phenomena such as acoustic moiré flat bands and topological phase transitions. However, the pursuit of strong near-field coupling in layers has necessitated to be tightly stacked at narrow distances subwavelength range. Here, beyond interlayer acoustics are reported concept coupling-immune is proposed. Remote decoupled distance theoretically, numerically, experimentally demonstrated. Tunable out-of-plane beam scanning successfully achieved by dynamically controlling twist angles. The engineered properties further extended multilayered vortices. Good robustness against external disturbances also observed for fabricated metasurfaces. presented work unlocks potential devices shaping, enabling practical applications remote dynamic detection, multiplexed underwater communication.

Язык: Английский

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Tunable underwater sound absorption characteristics of 0–3 piezoelectric anechoic coating

The Journal of the Acoustical Society of America, Год журнала: 2024, Номер 155(1), С. 156 - 170

Опубликована: Янв. 1, 2024

Piezoelectric composite materials (PCMs) with shunt damping circuits are used widely in hydroacoustics because of the flexible adjustability their parameters. PCMs offer good underwater sound absorption, but shortcomings remain, such as poor low-frequency narrow bandwidth, and a single dissipation mechanism. In this paper, tunable absorption 0–3 PCM combined cavity structure circuit (PCMC) is studied systematically. First, equivalent material parameters derived based on Yamada model, then theoretical electroacoustic model established for solving coefficient mutually verified numerical simulation method. On basis, characteristics analyzed. The results show that coupling energy mechanism acoustic not only achieves strong at lower frequencies also enriches mode mid-high by connecting circuits. Moreover, influence piezoelectric control variables morphology structural performance further explored. Finally, PCMC improved via shape optimization parameter optimization.

Язык: Английский

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Tunable acoustic transmission control and dual-mode ventilated sound insulation by a coupled acoustic metasurface

Physical Review Applied, Год журнала: 2024, Номер 21(4)

Опубликована: Апрель 24, 2024

Язык: Английский

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Wireless acoustic energy harvesting through an air-water metasurface with dual coupling resonators

Physical Review Applied, Год журнала: 2024, Номер 22(2)

Опубликована: Авг. 8, 2024

Extremely large acoustic impedance mismatching generates a natural barrier at the air-water interface, resulting in significantly impeding bidirectional wave propagation across heterogeneous interface. Here, an metasurface with dual coupling resonators is proposed to enhance transmission which facilitates implementation of wireless harvesting for energy A theoretical model established and derived obtain analytical expressions between microstructural geometric parameters. The analysis reveals that highly efficient mechanism depends on effect resonant cavities nonresonance modes. enhanced interface investigated verified numerically experimentally, maximum enhancement measured be approximately 19 dB peak frequency. Finally, implemented experimentally by integrating designed contact-separation-mode triboelectric nanogenerator, captured from waves effectively operates six LED lamps. ``bottom-up'' design methodology based acoustic-metasurface-embedded system opens promising routes underwater energy-supplying platforms medical ultrasound therapy.

Язык: Английский

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Water–air acoustic communication based on broadband impedance matching

Applied Physics Letters, Год журнала: 2023, Номер 123(19)

Опубликована: Ноя. 6, 2023

Efficient acoustic communication across the water–air interface has always been expected in field of ocean exploration. However, existing research works are mainly concentrated on narrow-band transmission based resonance, which greatly limits capacity and efficiency. Here, we combined air-based water-based metafluids to realize an exponential gradient impedance matching layer for broadband sound transmission. By cooperatively adjusting velocity thickness layers, modulated required parameters each into a reasonable range, can be conveniently achieved by proposed metafluids. A sample was constructed validated water tank. Experimental results show that achieve average energy enhancement above 16.7 dB from 880 1760 Hz interface. scene further experimentally demonstrated through transmitting multicolor picture air water, shows extremely high accuracy. Our work is promising more applications water-air opens avenue design implementation extreme case.

Язык: Английский

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