Results 91 to 100 of about 118,824 (293)

Material Dinding Kedap Suara dengan Memanfaatkan Pelepah Pisang Raja Susu [PDF]

, 2016
Noise becomes a very important issue to reach a level of comfort in the room. The choice of material is less precise also be the cause of the noise. The sound reduction may occur depending on the type of material absorption. Several previous studies have
, Dr. Ir. Dhani Mutiari, MT., , Dr. Moch. Solikin, Suharyani, Suharyani   +2 more
core  

Collective modes and sound propagation in a p-wave superconductor: Sr$_2$RuO$_4$

, 2000
There are five distinct collective modes in the recently discovered p-wave superconductor Sr$_2$RuO$_4$; phase and amplitude modes of the order parameter, clapping mode (real and imaginary), and spin wave. The first two modes also exist in the ordinary s-
D. F. Agterberg, G. M. Luke, H. Matsui, H. Y. Kee, H. Y. Kee, Hae-Young Kee, K. Ishida, K. Maki, K. Maki, K. Maki, Kazumi Maki, L. Kadanoff, L. Tewordt, M. Sigrist, M. Sigrist, M. Sigrist, S. Nishizaki, T. M. Rice, T. Tsuneto, Yong Baek Kim   +19 more
core   +1 more source

Linear and nonlinear resonant interaction of sound waves in dissipative layers [PDF]

, 2000
The theory of resonant nonlinear magnetohydrodynamic (MHD) waves in dissipative steady plasmas developed by Ballai and Erdélyi is used to study the effect of steady flows on nonlinear resonant heating of MHD waves in (a) linear, (b) weakly and (c ...
Ballai, I., Erdélyi, R., Goossens, M.
core   +1 more source

Toward Next‐Generation High‐Speed Communication and Imaging: Solution‐Processed Sb2(S,Se)3/CdS Heterojunction for Ultrafast Self‐Powered Photodetector

Advanced Science, EarlyView.
A high‐quality solution‐processed Sb2(S,Se)3/CdS heterojunction is designed to overcome the intrinsic limitations of conventional photodetectors. The fabricated device achieves an excellent self‐powered performance, including a high responsivity of 0.6 A W−1, an ultrahigh specific detectivity of 7.68 × 1012 Jones, and a wide 3db bandwidth of 175 kHz ...
Xuhua Xiao, Yichao Wang, Jingxuan Bian, Hailong Wang, Yongqiang Wang, Jinpeng Xu, Junwei Chen   +6 more
wiley   +1 more source

All‐in‐One Underwater Quality Evaluation Metamaterial With Mechanical Robustness, Sound Attenuation, and Diffuse Reflection

Advanced Science, EarlyView.
In this work, a bioinspired all‐in‐one underwater quality evaluation metamaterial, combining sound attenuation, diffuse reflection, and mechanical robustness, is proposed based on jumping spider locomotion and human skeletal biomechanics. Meanwhile, a CNN‑driven quality evaluation framework is established for theoretically dimension‐reduced ...
Hongze Li, Zhenyu Li, Jinshui Yang, Jianhao Wu, Yidan Chen, Linzhi Wu, Hong Hu, Penglin Gao, Yegao Qu   +8 more
wiley   +1 more source

Sound‐Insulation Performance of Polylactic Acid Parts 3D Printed by Fused Filament Fabrication with Functionally Graded Porous Structure for Effective Noise Reduction

Macromolecular Materials and Engineering
The emergence of 3D printing technology has enabled the fabrication of absorbers with functionally graded (FG) porous structure and controlled porosity that can absorb sound waves across a broader frequency range.
Reza Navidpour, Taher Azdast, Rezgar Hasanzadeh, Milad Moradian, Peyman Mihankhah, Asghar Rasouli   +5 more
doaj   +1 more source

Acoustic and durability performances of Arenga Pinnata panel [PDF]

, 2012
This study aims to investigate the feasibility of Arenga Pinnata fiber to be applied for acoustical material component. There different binders namely polyurethane, urea formaldehyde and latex were employed as binder.
Ismail, Lindawati
core  

Frequency Dispersion of Sound Propagation in Rouse Polymer Melts via Generalized Dynamic Random Phase Approximation

, 2003
An extended generalization of the dynamic random phase approximation (DRPA) for L-component polymer systems is presented. Unlike the original version of the DRPA, which relates the (LxL) matrices of the collective density-density time correlation ...
Akcasu, Akcasu, Akcasu, Akcasu, Akcasu, Alig, Anastasiadis, Benmouna, Benoit, Berger, Berger, Bobba, Brochard, Brochard-Wyart, Chester, Chrissopoulou, Curro, Doi, Erukhimovich, Erukhimovich, Gotlib, Gotlib, Hess, I. Ya Erukhimovich, Jian, Kaatze, Kramer, Landau, Lifshitz, Lifshitz, Lumma, Manevich, Mitlin, Pincus, Rostiashvili, Schweizer, Semenov, Semenov, Semenov, Shilov, Sillescu, Wartewig, Ya V. Kudryavtsev, Yerukhimovich   +43 more
core   +1 more source

Sound absorption coefficients and acoustical design

, 1961
Third International Congress on Acoustics ...
Northwood, T. D., Balachandran, C. G.
openaire   +1 more source

Experimental methodology for obtaining sound absorption coefficients

Revista Facultad Nacional de Salud Pública, 2011
Objective: the authors propose a new methodology for estimating sound absorption coefficients using genetic algorithms. Methodology: sound waves are generated and conducted along a rectangular silencer. The waves are then attenuated by the absorbing material covering the silencer’s walls.
Carlos A. Macía M, Hernán D. Sepúlveda D   +1 more
openaire   +1 more source