Results 121 to 130 of about 1,580,055 (393)
Design and demonstration of an acoustic right-angle bend [PDF]
, 2017 In this paper, we design, fabricate and experimentally characterize a broadband acoustic right-angle bend device in air. Perforated panels with various hole-sizes are used to construct the bend structure. Both the simulated and the experimental results verify that acoustic beam can be rotated effectively through the acoustic bend in a wide frequency ...
arxiv +1 more source
Reduced order modelling using parameterized non-uniform boundary conditions in room acoustic simulations [PDF]
arXiv, 2022 Quick simulations for iterative evaluations of multi-design variables and boundary conditions are essential to find the optimal acoustic conditions in building design. We propose to use the reduced basis method (RBM) for realistic room acoustic scenarios where the surfaces have inhomogeneous acoustic properties, which enables quick evaluations of ...
arxiv
Performance of profiled single noise barriers covered with quadratic residue diffusers [PDF]
, 2005 The paper describes an investigation about the acoustic performance of noise barriers with quadratic residue diffuser (QRD) tops, and with T-, Arrow-, Cylindrical and Y-shape profiles.
Lam, YW, Monazzam, M
core +2 more sources
Advanced Functional Materials, EarlyView.The dynamic polarization reversal of coexisting normal and relaxor ferroelectrics in 1D TMAPbI₃ (tetramethylammonium, TMA) is deciphered through combined experimental and theoretical approaches. By bridging atomic‐scale motion, macroscopic polarization switching, and depolarization effects, a universal methodology is established to engineer next ...
Chen Xue +8 more
wiley +1 more source
Utilizing Agricultural Waste Materials for the Development of Sustainable Sound Absorption Materials [PDF]
Nature Environment and Pollution TechnologyEnvironmental pollution is escalating due to inadequate waste management, with the open burning of agricultural waste being a significant contributor. This process releases various harmful gases into the environment.
Venkatesan B., Kannan V., Raja Priya P. and Karthiga Shenbagam N
doaj +1 more source
COMSOL’s New Thermoacoustics Interface and Computationally Efficient Alternative Formulations for FEM [PDF]
, 2011 Three efficient alternatives to the model in COMSOL’s thermoacoustics interface are presented. The higher efficiency of these models are explained from theory and are demonstrated by means of two ...
Kampinga, W.R., Wijnant, Y.H.
core +2 more sources
Ultrathin Acoustic Parity-Time Symmetric Metasurface Cloak [PDF]
, 2018 Invisibility or unhearability cloaks have beenmade possible by using metamaterials enabling light or sound to flow around obstacle without the trace of reflections or shadows.
Cheng, Jian-chun +7 more
core +3 more sources
Acoustic absorption of structural membranes
, 2021 A series of tests have been carried out to measure the absorption coefficient of structural membranes as well as some combinations used to improve ...
openaire +1 more source
Advanced Functional Materials, EarlyView.A visible light‐responsive polyacrylamide‐azobenzene hydrogel enables safe, reversible stiffness control for studying cell mechanobiology without harmful UV exposure. This approach reveals stem cells respond rapidly to mechanical changes, showing altered shape and protein distribution within one hour.
Aafreen Ansari +11 more
wiley +1 more source
Wavefront manipulation by acoustic metasurfaces: from physics and applications
Nanophotonics, 2018 Molding the wavefront of acoustic waves into the desired shape is of paramount significance in acoustics, which however are usually constrained by the acoustical response of naturally available materials.
Liang Bin +2 more
doaj +1 more source