A New Methodology Based on Cell-Wall Hole Analysis for the Structure-Acoustic Absorption Correlation on Polyurethane Foams. [PDF]
Polymers (Basel), 2022 Polyurethane foams with a hybrid structure between closed cell and open cell were fabricated and fully characterized. Sound absorption measurements were carried out in order to assess their acoustic performance at different frequency ranges. The cellular
Merillas B +2 more
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Enhanced Broadband Acoustic Absorption in Commercial Foam via Multiwall Carbon Nanotube-Induced Pore Reconstruction. [PDF]
Adv Sci (Weinh)Noise pollution is an urgent environmental issue that leads to a series of adverse effects on human physical and mental health. Porous materials with rationally designed micropores or channels can effectively absorb noise across wide frequency ranges ...
Xiong J +11 more
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Highly compressible and anisotropic lamellar ceramic sponges with superior thermal insulation and acoustic absorption performances. [PDF]
Nat Commun, 2020 Advanced ceramic sponge materials with temperature-invariant high compressibility are urgently needed as thermal insulators, energy absorbers, catalyst carriers, and high temperature air filters.
Jia C +15 more
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Effects of Freeze-Drying Processes on the Acoustic Absorption Performance of Sustainable Cellulose Nanocrystal Aerogels. [PDF]
GelsCellulose aerogels have great prospects for noise reduction applications due to their sustainable value and superior 3D interconnected porous structures.
Ruan JQ +8 more
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Microwave and Acoustic Absorption Metamaterials [PDF]
Physical Review Applied, 2022 Wave absorption metamaterials have been an enduring topic over the past two decades, propelled not only by novel scientific advances, but also by their extensive application potential.
Ping Sheng, Qu Sichao
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Graded and Anisotropic Porous Materials for Broadband and Angular Maximal Acoustic Absorption. [PDF]
Materials (Basel), 2020 The design of graded and anisotropic materials has been of significant interest, especially for sound absorption purposes. Together with the rise of additive manufacturing techniques, new possibilities are emerging from engineered porous micro-structures.
Cavalieri T +6 more
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Ultra-broadband acoustic absorption with inhomogeneous high-order Fabry–Pérot resonances
APL Materials, 2023 We present an ultra-broadband acoustic metamaterial with inhomogeneous high-order Fabry–Pérot (FP) resonances that achieves near-perfect continuous absorption in the range of 400–10000 Hz.
Jiu Hui Wu, , Wu Jiu Hui
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Damped resonance for broadband acoustic absorption in one-port and two-port systems. [PDF]
Sci Rep, 2019 We demonstrate broadband perfect acoustic absorption by damped resonances through inclusion of lossy porous media. By minimally placing the lossy materials around the necks of single-resonance Helmholtz resonators, where acoustic energy is concentrated ...
Lee T, Nomura T, Iizuka H.
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Cement and Concrete Composites, 2020 Acoustic and thermal comfort play an important role in the building environment. This study investigates ultra-lightweight concrete incorporating Miscanthus fibers as lightweight aggregates to improve sound absorption and thermal insulation properties ...
Fan Wu, Qingliang Yu, Yuxuan Chen
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Bandwidth broadening in cavity-type sound-absorbing metamaterials via additional equivalent stiffness [PDF]
Scientific ReportsThe fixed acoustic characteristics of unit-cell cavities fundamentally limit the broadband sound absorption performance of cavity-type sound-absorbing metamaterials.
Li Bo Wang, Jiu Hui Wu, Jun Fu Zhang
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