Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical characteristics that paved a new pathway for...

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Bibliographic Details
Published in:Crystals (Basel) 2020-08, Vol.10 (8), p.686
Main Authors: Kumar, Sanjay, Lee, Heow Pueh
Format: Article
Language:English
Subjects:
Acoustic attenuation
acoustic metamaterials
Acoustics
air ventilation
architectural acoustics
Biomedical materials
Coiling
Design
Energy harvesting
Membranes
Metamaterials
Permeability
Propagation
Sound attenuation
Sound waves
Ventilation
Wave attenuation
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Summary:In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical characteristics that paved a new pathway for researchers to develop effective solutions for a wide variety of multifunctional applications, such as low-frequency sound attenuation, sound wave manipulation, energy harvesting, acoustic focusing, acoustic cloaking, biomedical acoustics, and topological acoustics. This review provides an update on the acoustic metamaterials’ recent progress for simultaneous sound attenuation and air ventilation performances. Several variants of acoustic metamaterials, such as locally resonant structures, space-coiling, holey and labyrinthine metamaterials, and Fano resonant materials, are discussed briefly. Finally, the current challenges and future outlook in this emerging field are discussed as well.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst10080686