Results 91 to 100 of about 336,595 (312)
Auralization of Accelerating Passenger Cars Using Spectral Modeling Synthesis
Applied Sciences, 2015 While the technique of auralization has been in use for quite some time in architectural acoustics, the application to environmental noise has been discovered only recently.
Reto Pieren +2 more
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Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories
Advanced Engineering Materials, EarlyView.Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter +5 more
wiley +1 more source
Oil metal particles Detection Algorithm Based on Wavelet Transform
MATEC Web of Conferences, 2017 In order to observe the real-time abrasion status of the aero-engine, we need to monitor the lubrication system online. As the aero-engine operating time and running state changes, the concentration, composition, size and other parameters of the metal ...
Shang Wei +3 more
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Effect of small boat engine noise on hearing loss of fishermen and efficiency of small boat engine silencer [PDF]
Global Journal of Environmental Science and ManagementBACKGROUND AND OBJECTIVES: The fishery workers are affected by the noise produced by motorboats, which is caused by long-term (more than 7 hours per day), exposure to high frequencies and hazardous noise levels.
S. Sinworn, N. Viriyawattana
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Advanced 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
NASA/GE quiet engine C acoustic test results [PDF]
The acoustic investigation and evaluation of the C propulsion turbofan engine are discussed. The engine was built as a part of the Quiet Engine Program.
Kazin, S. B., Pass, J. E.
core +1 more source
Advanced Engineering Materials, EarlyView.This study reports lightweight polyetherimide triply periodic minimal surfaces lattices coated with carbon nanotube‐reinforced epoxy that combine mechanical robustness with self‐sensing. The conformal coating enhances stiffness, strength and energy absorption while enabling reliable strain monitoring.
A. Triay +3 more
wiley +1 more source
Core noise measurements on a YF-102 turbofan engine [PDF]
Core noise from a YF-102 high bypass ratio turbofan engine was investigated through the use of simultaneous measurements of internal fluctuating pressures and far field noise.
Karchmer, A. M. +3 more
core +1 more source
Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing
Advanced Engineering Materials, EarlyView.This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu +10 more
wiley +1 more source
Analysis of the Noise Characteristic of Automotive Engine Timing Chain System
Jixie chuandong, 2016 The noise of automobile engine valve timing mechanism is one of the main sources of engine mechanical noise,which is directly related to the power performance of the engine.
Xu Shuxin +3 more
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