Results 41 to 50 of about 313,410 (304)
Acoustical characteristic of empty fruit bunch (EFB) fibre with influence of sodium hydroxide treatment time and decay lifespan [PDF]
, 2019 Research on natural fibres has gain much interest in recent years due to the sustaibability and avaibility in which demand for green renewable reinforced composites. Natural fibres can be considered as the alternative way to replace the synthetic fibre
Mat Wan, Lauren
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Acoustical properties of double porosity granular materials [PDF]
, 2011 Granular materials have been conventionally used for acoustic treatment due to their sound absorptive and sound insulating properties. An emerging field is the study of the acoustical properties of multiscale porous materials.
Umnova, O, Venegas, R
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Absorption of Sound Wave by Fabrics
Journal of the Textile Machinery Society of Japan, 1963 目的 織物の通気抵抗を測定し, 吸音特性に及ぼす通気抵抗の影響を究明する. 成果 (1) 織物の通気抵抗Rfは流速Vの関数としてRf=Ai+BiVで表わされる.AiとBiは密度と組織によって定まる常数である.同一組織であれば, 密度が小さい織物はBδ≒0, 密度が大きくなるとAi, Biともに増加する. (2) 流速の遅い範囲でRf-Aiとみなせる織物の吸音機構は完全粘性抵抗型である. (3) 完全粘性抵抗型の織物の吸音特性と通気抵抗Rfの間にはつぎの関係が成立つf0= (c/4-aiRf) d-1;α ∞=a'iRfここにα∞;最大吸音率, f0;α ∞ を示す振動数, d;織物の背後空気層の長さ, c;音速, a'i, ai;組織によって定まる常数である.
Sadao Aso, Rikuhiro Kinoshita
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Multi‐Scale Interface Engineering of MXenes for Multifunctional Sensory Systems
Advanced Functional Materials, EarlyView.MXenes, as two‐dimensional transition metal carbides and nitrides, demonstrate remarkable capabilities for multifunctional sensing applications. This review systematically examines multi‐scale interface engineering approaches that enhance sensing performance, enable diverse detection functionalities, and improve system‐level compatibility in MXene ...
Jiaying Liao, Sin‐Yi Pang, Jianhua Hao
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A Non‐Reciprocal Architected Porous Medium
Advanced Functional Materials, EarlyView.ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies +2 more
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Sound absorption performance of lattice structures in spiral-shaped flow channels
Nihon Kikai Gakkai ronbunshuThis study investigates how incorporating a twisted wall structure into a lattice structure improves sound absorption performance based on the numerical and experimental investigation.
Seiji MIYAKE +2 more
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Akytojo betono garso absorbcijos tyrimai/Porous concrete sound absorption investigation
Journal of Civil Engineering and Management, 1996 Low-density porous concrete can be used as a sound absorbing material. This paper generalizes porous concrete sound absorption investigations. Porous concrete relative wave resistance modulus is longer than air wave resistance W=1 and that is why this
Antanas Laukaitis, Vytautas Lasauskas
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, 2019 Proceedings of the ICA 2019 and EAA Euroregio : 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019 : 9-13 September 2019, Aachen, Germany / proceedings editor: Martin Ochmann, Michael Vorländer, Janina Fels 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019, ICA 2019, Aachen, Germany, 9 Sep 2019 - 13 ...
Li, Mengmeng +3 more
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Laser‐Assisted Processing and Modification of Bioactive Glasses: A Review
Advanced Healthcare Materials, EarlyView.Laser technologies provide powerful tools to process and transform bioactive glasses for advanced biomedical applications. This review discusses laser‐matter interaction mechanisms, laser surface engineering, and laser‐assisted fabrication of scaffolds and nanofibers.
Antonio Riveiro +8 more
wiley +1 more source
Advanced Healthcare Materials, EarlyView.This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi +7 more
wiley +1 more source