Sound attenuation using microelectromechanical systems fabricated acoustic metamaterials

2013 ◽  
Vol 113 (2) ◽  
pp. 024906 ◽  
Author(s):  
William N. Yunker ◽  
Colin B. Stevens ◽  
George T. Flowers ◽  
Robert N. Dean
Keyword(s):  
Microelectromechanical Systems ◽  
Sound Attenuation ◽  
Acoustic Metamaterials

Microporous and Flexible Framework Acoustic Metamaterials for Sound Attenuation and Contrast Agent Applications

2018 ◽  
Vol 10 (51) ◽  
pp. 44226-44230 ◽  
Author(s):  
Quin R. S. Miller ◽  
Satish K. Nune ◽  
H. Todd Schaef ◽  
Ki Won Jung ◽  
Kayte M. Denslow ◽  
...  
Keyword(s):  
Contrast Agent ◽  
Sound Attenuation ◽  
Acoustic Metamaterials ◽  
Flexible Framework

Theoretical investigation of the sound attenuation of membrane-type acoustic metamaterials

2012 ◽  
Vol 376 (17) ◽  
pp. 1489-1494 ◽  
Author(s):  
Yuguang Zhang ◽  
Jihong Wen ◽  
Yong Xiao ◽  
Xisen Wen ◽  
Jianwei Wang
Keyword(s):  
Theoretical Investigation ◽  
Sound Attenuation ◽  
Acoustic Metamaterials ◽  
Membrane Type

Broadband fractal acoustic metamaterials for low-frequency sound attenuation

2016 ◽  
Vol 109 (13) ◽  
pp. 131901 ◽  
Author(s):  
Gang Yong Song ◽  
Qiang Cheng ◽  
Bei Huang ◽  
Hui Yuan Dong ◽  
Tie Jun Cui
Keyword(s):  
Low Frequency ◽  
Sound Attenuation ◽  
Acoustic Metamaterials ◽  
Frequency Sound

Analytical Model for Low-Frequency Transmission Loss Calculation of Zero-Prestressed Plates With Arbitrary Mass Loading

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
William T. Edwards ◽  
Chia-Ming Chang ◽  
Geoffrey McKnight ◽  
Steven R. Nutt
Keyword(s):  
Boundary Conditions ◽  
Analytical Model ◽  
Transmission Loss ◽  
Mass Density ◽  
Low Frequency ◽  
Sound Attenuation ◽  
Mode Shapes ◽  
Natural Mode ◽  
Rectangular Plates ◽  
Acoustic Metamaterials

As the importance of sound attenuation through weight-critical structures has grown and mass law based strategies have proven impractical, engineers have pursued alternative approaches for sound attenuation. Membrane-type acoustic metamaterials have demonstrated sound attenuation significantly higher than mass law predictions for narrow, tunable bandwidths. Similar phenomena can be achieved with plate-like structures. This paper presents an analytical model for the prediction of transmission loss through rectangular plates arbitrarily loaded with rigid masses, accommodating any combination of clamped and simply supported boundary conditions. Equations of motion are solved using a modal expansion approach, incorporating admissible eigenfunctions given by the natural mode shapes of single-span beams. The effective surface mass density is calculated and used to predict the transmission loss of low-frequency sound through the plate–mass structure. To validate the model, finite element results are compared against analytical predictions of modal behavior and shown to achieve agreement. The model is then used to explore the influence of various combinations of boundary conditions on the transmission loss properties of the structure, revealing that the symmetry of plate mounting conditions strongly affects transmission loss behavior and is a critical design parameter.

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

2020 ◽  
Author(s):  
Sanjay Kumar ◽  
Heow Lee
Keyword(s):  
Sound Wave ◽  
Recent Progress ◽  
Low Frequency ◽  
Sound Attenuation ◽  
Acoustic Metamaterials ◽  
Future Outlook ◽  
Resonant Structures ◽  
The Past ◽  
Acoustic Focusing ◽  
Air Ventilation

In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which is difficult to be found in naturally available materials. The acoustic metamaterials have demonstrated to exhibit 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 is discussed as well.

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

2020 ◽  
Author(s):  
Sanjay Kumar ◽  
Heow Pueh Lee
Keyword(s):  
Sound Wave ◽  
Recent Progress ◽  
Low Frequency ◽  
Sound Attenuation ◽  
Acoustic Metamaterials ◽  
Future Outlook ◽  
Resonant Structures ◽  
The Past ◽  
Acoustic Focusing ◽  
Air Ventilation

In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which is difficult to be found in naturally available materials. The acoustic metamaterials have demonstrated to exhibit 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 is discussed as well.

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

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 686
Author(s):  
Sanjay Kumar ◽  
Heow Pueh Lee
Keyword(s):  
Sound Wave ◽  
Recent Progress ◽  
Low Frequency ◽  
Sound Attenuation ◽  
Acoustic Metamaterials ◽  
Future Outlook ◽  
Resonant Structures ◽  
The Past ◽  
Acoustic Focusing ◽  
Air Ventilation

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.

scholarly journals Spider Web-Inspired Lightweight Membrane-Type Acoustic Metamaterials for Broadband Low-Frequency Sound Isolation

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1146
Author(s):  
Heyuan Huang ◽  
Ertai Cao ◽  
Meiying Zhao ◽  
Sagr Alamri ◽  
Bing Li
Keyword(s):  
Reference Model ◽  
Low Frequency ◽  
Sound Attenuation ◽  
Polymeric Membrane ◽  
Acoustic Metamaterials ◽  
Frequency Range ◽  
Spider Web ◽  
Frequency Sound ◽  
Resonance Modes ◽  
Membrane Type

Membrane-type acoustic metamaterial (MAM) has exhibited superior sound isolation properties, as well as thin and light characteristics. However, the anti-resonance modes of traditional MAMs are generated intermittently in a wide frequency range causing discontinuities in the anti-resonance modes. Achieving broadband low-frequency sound attenuation with lightweight MAM design is still a pivotal research aspect. Here, we present a strategy to realize wide sound-attenuation bands in low frequency range by introducing the design concept of bionic configuration philosophy into the MAM structures. Built by a polymeric membrane and a set of resonators, two kinds of MAM models are proposed based on the insight of a spider web topology. The sound attenuation performance and physical mechanisms are numerically and experimentally investigated. Multi-state anti-resonance modes, induced by the coupling of the bio-inspired arrangement and the host polymer film, are systematically explored. Significant sound attenuation is numerically and experimentally observed in both the lightweight bio-inspired designs. Remarkably, compared with a traditional MAM configuration, a prominent enhancement in both attenuation bandwidth and weight-reduction performance is verified. In particular, the bio-inspired MAM Model I exhibits a similar isolation performance as the reference model, but the weight is reduced by nearly half. The bio-inspired Model II broadens the sound attenuation bandwidth greatly; meanwhile, it retains a lighter weight design. The proposed bio-inspired strategies provide potential ways for designing sound isolation devices with both high functional and lightweight performance.

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