Results 21 to 30 of about 2,601,359 (257)

Dynamic responses of a wind turbine drivetrain under turbulent wind and voltage disturbance conditions

open access: yesAdvances in Mechanical Engineering, 2016
Wind energy is known as one of the most efficient clean renewable energy sources and has attracted extensive research interests in both academic and industry fields.
Chengwu Li   +3 more
doaj   +1 more source

Effect of Nylon Membrane Thickness on the Value of Sound Transmission Loss as an Alternative Insulation Material

open access: yesJurnal Fisika Flux, 2023
Measurements of sound transmission loss have been successfully carried out on various thicknesses of nylon membrane as an absorbing material. Nylon membrane were prepared using hydrogen chloride (HCl) and acetyl aceton in the casting solution by phase ...
Wenny Maulina   +2 more
doaj   +1 more source

A Computationally-Efficient Numerical Model to Characterize the Noise Behavior of Metal-Framed Walls

open access: yesMetals, 2015
Architects, designers, and engineers are making great efforts to design acoustically-efficient metal-framed walls, minimizing acoustic bridging. Therefore, efficient simulation models to predict the acoustic insulation complying with ISO 10140 are needed
Arun Arjunan   +4 more
doaj   +1 more source

Study of high frequency acoustic directional transmission model based on graphene structure

open access: yesAIP Advances, 2020
The directional transmission of high-frequency sound waves is of great significance to the development of underwater communication and cell photoacoustic detection.
Peng Yang   +3 more
doaj   +1 more source

Model approximation for sound transmission from underwater structures in high-frequency range [PDF]

open access: yesMATEC Web of Conferences, 2019
Sound-insulation model provides a straightforward way to describe sound transmission behaviours of the thin-walled structures in engineering applications.
Zhang Rui   +3 more
doaj   +1 more source

Experimental Comparison of Sound Transmission via Ventilation Ducts: Sheet Metal vs. Glass Wool Systems

open access: yesArchitecture
The increasing use of mechanical ventilation systems in energy efficient buildings introduces a significant pathway for acoustic crosstalk between rooms via air ducts.
Petr Kuklík   +2 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

open access: yesAdvanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara   +8 more
wiley   +1 more source

Symmetry‐Guided Multifunctional Acoustic System Based on Mechanically Actuated Sonic Crystals

open access: yesAdvanced Engineering Materials, EarlyView.
This study presents the design, simulation, and experimental validation of amultifunctional acoustic metamaterial based on rotationally engineered sonic crystals.By tuning cylinder orientations, controllable band gaps and six distinct functionalities—including switching, topological insulation, beam splitting, and logic operations—areachieved ...
Yuanyan Zhao   +2 more
wiley   +1 more source

Enhanced Ultrasound Transmission Through Aberration Layers Using Space‐Coiling Acoustic Metamaterials

open access: yesAdvanced Engineering Materials, EarlyView.
Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami   +4 more
wiley   +1 more source

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