Acoustic energy harvesting based on a planar acoustic metamaterial

Qi, Shuibao; Oudich, Mourad; Li, Yong; Assouar, Badreddine

doi:10.1063/1.4954987

Cited by 162 publications

(88 citation statements)

References 26 publications

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“…Generally, a piezoelectric bimorph with the acoustic metamaterials is used for energy conversion. Based on this concept, several works have been reported [99][100][101][102]. Although the extracted electrical energy is on a minute scale, it may be improved further in the future with more innovative designs.…”

Section: Challenges and Future Outlookmentioning

confidence: 99%

The Present and Future Role of Acoustic Metamaterials for Architectural and Urban Noise Mitigations

Kumar

Lee

2019

Acoustics

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Owing to a steep rise in urban population, there has been a continuous growth in construction of buildings, public or private transport like cars, motorbikes, trains, and planes at a global level. Hence, urban noise has become a major issue affecting the health and quality of human life. In the current environmental scenario, architectural acoustics has been directed towards controlling and manipulating sound waves at a desired level. Structural engineers and designers are moving towards green technologies, which may help improve the overall comfort level of residents. A variety of conventional sound absorbing materials are being used to reduce noise, but attenuation of low-frequency noise still remains a challenge. Recently, acoustic metamaterials that enable low-frequency sound manipulation, mitigation, and control have been widely used for architectural acoustics and traffic noise mitigation. This review article provides an overview of the role of acoustic metamaterials for architectural acoustics and road noise mitigation applications. The current challenges and prominent future directions in the field are also highlighted.

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Section: Challenges and Future Outlookmentioning

confidence: 99%

The Present and Future Role of Acoustic Metamaterials for Architectural and Urban Noise Mitigations

Kumar

Lee

2019

Acoustics

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“…Piezoelectric energy harvesting is driven by the deformation of the host structure due to mechanical or acoustic vibrations that convert to an electrical potential via embedded piezoelectric materials. To increase harvester efficiency, using ideas based around structuring surfaces, several approaches such as creating a parabolic acoustic mirror, point defects in periodic phononic crystals and acoustic funnels have been employed [28][29][30][31]; lenses to concentrate narrow band vibrations have been proposed using phononic crystals [32][33][34], ideas based around localised defect states [35], and resonant metamaterials endowed with piezoelectric inserts have appeared very recently [36]. Our aim here is to complement these studies by using a graded array to create a metawedge [37], and introduce piezoelectric elements into the array, this addresses one of the main challenges in energy harvesting which is to achieve broadband energy production from ambient vibration spectra.…”

Section: Introductionmentioning

confidence: 99%

Graded elastic metasurface for enhanced energy harvesting

Colombi²,

et al. 2020

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In elastic wave systems, combining the powerful concepts of resonance and spatial grading within structured surface arrays enable resonant metasurfaces to exhibit broadband wave trapping, mode conversion from surface (Rayleigh) waves to bulk (shear) waves, and spatial frequency selection. Devices built around these concepts allow for precise control of surface waves, often with structures that are subwavelength, and utilise Rainbow trapping that separates the signal spatially by frequency. Rainbow trapping yields large amplifications of displacement at the resonator positions where each frequency component accumulates. We investigate whether this amplification, and the associated control, can be used to create energy harvesting devices; the potential advantages and disadvantages of using graded resonant devices as energy harvesters is considered. We concentrate upon elastic plate models for which the A 0 mode dominates, and take advantage of the large displacement amplitudes in graded resonant arrays of rods, to design innovative metasurfaces that trap waves for enhanced piezoelectric energy harvesting. Numerical simulation allows us to identify the advantages of such graded metasurface devices and quantify its efficiency, we also develop accurate models of the phenomena and extend our analysis to that of an elastic half-space and Rayleigh surface waves.

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“…New ideas in the field of acoustic metasurfaces, beyond those reviewed here, will certainly emerge in the near future, with more powerful abilities to manipulate sound wave in various ways that are closely related to our everyday life, such as acoustic energy harvesting 11, 73,128 and noise abatement. Thus, we conclude that the future of acoustic metasurfaces is sound and bright.…”

Section: Discussionmentioning

confidence: 97%