Journal ArticleDOI
Acoustic metamaterial panels for sound attenuation in the 50–1000 Hz regime
TLDR
In this paper, the authors show that thin membrane-type acoustic metamaterials can serve as a total reflection nodal surface at certain frequencies, which implies that several membrane panels can be stacked to achieve broad-frequency effectiveness.Abstract:
We show experimentally that thin membrane-type acoustic metamaterials can serve as a total reflection nodal surface at certain frequencies. The small decay length of the evanescent waves at these frequencies implies that several membrane panels can be stacked to achieve broad-frequency effectiveness. We report the realization of acoustic metamaterial panels with thickness ≤15 mm and weight ≤3 kg/m2 demonstrating 19.5 dB of internal sound transmission loss (STL) at around 200 Hz, and stacked panels with thickness ≤60 mm and weight ≤15 kg/m2 demonstrating an average STL of >40 dB over a broad range from 50 to 1000 Hz.read more
Citations
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Journal ArticleDOI
Controlling sound with acoustic metamaterials
TL;DR: In this article, a review of the design and properties of active acoustic metamaterials can be found, as well as an overview of future directions in the field of sound manipulation.
Journal ArticleDOI
Acoustic metamaterials: From local resonances to broad horizons.
Guancong Ma,Ping Sheng +1 more
TL;DR: This review traces the development of acoustic metamaterials from the initial findings of mass density and bulk modulus frequency dispersions in locally resonant structures to the diverse functionalities afforded by the perspective of negative constitutive parameter values, and their implications for acoustic wave behaviors.
Journal ArticleDOI
Dark acoustic metamaterials as super absorbers for low-frequency sound
TL;DR: A thin-film acoustic metamaterial, comprising an elastic membrane decorated with asymmetric rigid platelets that aims to totally absorb low-frequency airborne sound at selective resonance frequencies ranging from 100-1,000 Hz, can reach almost unity absorption at frequencies where the relevant sound wavelength in air is three orders of magnitude larger than the membrane thickness.
Journal ArticleDOI
Acoustic metasurface with hybrid resonances
TL;DR: It is demonstrated that by using a simple construction, an acoustically reflecting surface can acquire hybrid resonances and becomes impedance-matched to airborne sound at tunable frequencies, such that no reflection is generated.
Journal ArticleDOI
Bioinspired engineering of honeycomb structure – Using nature to inspire human innovation
Qian-Cheng Zhang,Xiaohu Yang,Peng Li,Guoyou Huang,Shangsheng Feng,Cheng Shen,Bin Han,Xiaohui Zhang,Feng Jin,Feng Xu,Tian Jian Lu +10 more
TL;DR: A review of the interdisciplinary efforts to better understand the design principles for products with honeycomb structures, including their fabrication, performance (e.g., mechanical, thermal and acoustic properties) as well as optimization design is presented in this article.
References
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Journal ArticleDOI
Locally Resonant Sonic Materials
TL;DR: In this article, a 2-centimeter slab of this composite material is shown to break the conventional mass-density law of sound transmission by one or more orders of magnitude at 400 hertz.
Journal ArticleDOI
Ultrasonic metamaterials with negative modulus
Nicholas X. Fang,Dongjuan Xi,Jianyi Xu,Muralidhar Ambati,Werayut Srituravanich,Cheng Sun,Xiang Zhang +6 more
TL;DR: A new class of ultrasonic metamaterials consisting of an array of subwavelength Helmholtz resonators with designed acoustic inductance and capacitance with an effective dynamic modulus with negative values near the resonance frequency is reported.
Journal ArticleDOI
Membrane-Type Acoustic Metamaterial with Negative Dynamic Mass
TL;DR: In this article, the authors present the experimental realization and theoretical understanding of a membrane-type acoustic metamaterial with very simple construct, capable of breaking the mass density law of sound attenuation in the 100-1000 Hz regime by a significant margin.
Journal Article
Membrane-type acoustic metamaterial with negative dynamic mass
TL;DR: The experimental realization and theoretical understanding of a membrane-type acoustic metamaterial with very simple construct, capable of breaking the mass density law of sound attenuation in the 100-1000 Hz regime by a significant margin are presented.
Journal ArticleDOI
Sound transmission through multi-panel structures lined with elastic porous materials
TL;DR: In this article, the authors used the theory proposed by Biot to calculate the transmission loss of double panels at arbitrary angles of incidence; results calculated over a range of incidence angles may then be combined to yield the random incidence transmission loss.