Sound-Absorption Coefficient of Bark-Based Insulation Panels [PDF]
Polymers (Basel), 2020 The objective of this study was to investigate the sound absorption coefficient of bark-based insulation panels made of softwood barks Spruce (Picea abies (L.) H.
E. Tudor +5 more
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Light absorption coefficient of an ordered array of spherical quantum dot chains [PDF]
Condensed Matter Physics, 2017 We considered intersubband electron transitions in an array of one-dimensional chains of spherical quantum dots in the GaAs/Al_xGa_{1-x}As semiconductor system.
V.I. Boichuk +2 more
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Investigation of the Effect of Non-Flat Surfaces on the Performance of Perforated Acoustic Absorber [PDF]
Archives of Acoustics, 2023 In order to investigate the effect of the surface shape on the performance of perforated panels, three non-flat shapes were considered for perforated panel with their absorption performance compared with the usual shape of the (flat) perforated panel. In
Zahra Hashemi +2 more
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Heliyon, 2022 Noise is one of the most harmful factors in the work environment, which is very important to control. There are various techniques to achieve this goal. One of the most important of them is the use of noise absorbers.
Ashkan Jafari malekabad +5 more
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Theoretical assessment of sound absorption coefficient for anisotropic nonwovens [PDF]
QScience Connect, 2012 The anisotropy factor as a function of fiber arrangement, fiber fineness and sample thickness has been derived from the theories of soundwave transformation due to phase changing.
Klara Kalinova
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Absorption coefficient measurement of bremsstrahlung radiation in nano composite [PDF]
Engineering and Technology Journal, 2015 In The present work has been prepare samples of polymer and the formation of composite material at different rates (20%, 50% &70%) of nano lead to clarify the difference in the spectrum absorption bremsstrahlung rays through the process of exponential ...
Noor M. Aowd, Hayder S.Hussain
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Sound Absorption and Diffusion by 2D Arrays of Helmholtz Resonators
Applied Sciences, 2020 We report a theoretical and experimental study of an array of Helmholtz resonators optimized to achieve both efficient sound absorption and diffusion. The analysis starts with a simplified 1D model where the plane wave approximation is used to design an ...
Iván Herrero-Durá +5 more
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ACS Applied Materials and Interfaces, 2020 Developing high-performance electromagnetic interference (EMI) shielding materials with high absorption coefficient is highly desired for eliminating the secondary pollution of reflected electromagnetic wave (EMW).
Zi-Han Zhou +6 more
semanticscholar +1 more source
Investigation of the sound absorption properties of gypsum particleboard produced with kenaf stalks and nano clay [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2014 In this study sound absorption coefficient and hardness of gypsum particleboard produced with kenaf stalk and nano clay were investigated. Variables in this study were weight ratio of kenaf stalks to poplar wood in three levels (40, 50 and 60 %) and nano
Hossein Rangavar, Mohammad hassan Payan
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Constrained two-stream algorithm for calculating aerosol light absorption coefficient from the Particle Soot Absorption Photometer [PDF]
Atmospheric Measurement Techniques, 2014 We present a new correction scheme for filter-based absorption photometers based on a constrained two-stream (CTS) radiative transfer model and experimental calibrations.
T. Müller, A. Virkkula, J. A. Ogren
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