Results 51 to 60 of about 22,518 (261)
Analysis of Sound Absorbing Properties of Activated Carbon Fiber Felts Based on Density Change
Nantong Daxue xuebao. Ziran kexue ban, 2021 In order to study the sound absorbing properties of activated carbon fiber felts, three kinds of activated carbon fiber felts with different densities were selected, and the double channel acoustic analyzer with impedance tube was used to test the ...
SHEN Yue, YAN Xuefeng, LIU Qixia
doaj +1 more source
Acoustic metafluid for independent manipulation of the mass density and bulk modulus
Materials & Design, 2023 Tuning the mass density and bulk modulus independently is the key to manipulate the propagation of sound wave. Acoustic metamaterials provide a feasible method to realize various acoustic parameters.
Yafeng Bi +7 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Advanced ink systems for solution‐processed textile triboelectric nanogenerators are systematically summarized, spanning conductive, tribo‐negative, and tribo‐positive layers. By connecting ink chemistry, deposition methods, and device function, the present review reveals the key governing principles of solution development and highlights practical ...
Xinlong Sun, Stephen Beeby
wiley +1 more source
AIP Advances, 2021 In this paper, a Multiphysics coupling simulation model of flow and acoustics is proposed using COMSOL software, and its results are verified by comparing with experimental results of others. Then, the aerodynamic pressure above the bluff body surface at
Min Li, Jiu Hui Wu, Xiao Yang Yuan
doaj +1 more source
A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption
Applied Sciences, 2021 A perforated plate with stepwise apertures (PPSA) is proposed to improve sound absorption for low frequencies. In contrast with an ordinary perforated plate with insufficient acoustic resistance and small acoustic mass, the perforated plate with stepped ...
Xin Li, Bilong Liu, Chong Qin
doaj +1 more source
Advanced Functional Materials, EarlyView.Top‐down ultrasonication produces highly emissive Cs2ZrCl6:Te4+ nanocrystals (NCs) with a PLQY of 65%, which is higher compared to that of the NCs synthesized by typical bottom‐up hot‐injection synthesis. The colloidal Cs2ZrCl6:Te4+ NCs have been found to be potential candidates for x‐ray scintillation imaging.
Yang Liu +12 more
wiley +1 more source
Nonlinear acoustic impedance of circular vent holes in miniaturized speakers [PDF]
JASA Express LettersBack volume vent holes are designed to boost the low-frequency response of miniaturized electro-acoustic transducers in hearing aids and earphones. The acoustic impedance of these small vent holes considerably alters the frequency response of the speaker.
Mohammad Mohammadi
doaj +1 more source
Amphoteric Cu‐Doping Leading to High Thermoelectric Performance in p‐Type Bismuth Antimony Telluride
Advanced Functional Materials, EarlyView.This study shows that Cu plays two opposite roles in p‐type Bi0.5Sb1.5Te3 depending on the processing route. Under thermodynamic‐equilibrium bulk‐synthesis, Cu mainly occupies cation sites, increases hole concentration, preserves mobility, and slightly reduces lattice heat transport. The best‐performing composition among the investigated series reaches
Moritz Thiem +15 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Nitride MXenes remain constrained by a persistent gap between computational prediction and experimental realization. This Review identifies the thermodynamic, kinetic, and chemical barriers limiting their synthesis, critically evaluates emerging fabrication routes, and proposes a multidimensional computational‐experimental framework to accelerate the ...
Naresh Varnakavi, Masoud Soroush
wiley +1 more source
The frequencies of localized acoustic modes in Au/V nanolayers with capping layer
Archives of Acoustics, 2014 Paper presents the results of theoretical analysis of localized acoustic modes, which can be generated in Au/V nanolayers with “heavy” capping layer.
M. Aleksiejuk
doaj