Results 41 to 50 of about 2,071,116 (352)

Aerofoil broadband noise reductions through double-wavelength leading-edge serrations: a new control concept

open access: yesJournal of Fluid Mechanics, 2018
Aerofoils operating in a turbulent flow generate broadband noise by scattering vorticity into sound at the leading edge. Previous work has demonstrated the effectiveness by which serrations, or undulations, introduced onto the leading edge, can ...
P. Chaitanya   +3 more
semanticscholar   +1 more source

Broadband doa estimation using convolutional neural networks trained with noise signals [PDF]

open access: yesIEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2017
A convolution neural network (CNN) based classification method for broadband DOA estimation is proposed, where the phase component of the short-time Fourier transform coefficients of the received microphone signals are directly fed into the CNN and the ...
Soumitro Chakrabarty, Emanuël Habets
semanticscholar   +1 more source

Elliptical side resonators for broadband noise reduction: theory and experiments [PDF]

open access: yes, 2006
Previous research of the authors pointed out that side-resonators can be applied to reduce fan noise. However, the noise reduction capabilities of most resonator geometries, e.g.
Boer, A. de   +2 more
core   +1 more source

SiGe HBT X-Band LNAs for Ultra-Low-Noise Cryogenic Receivers [PDF]

open access: yes, 2008
We report results on the cryogenic operation of two different monolithic X-band silicon-germanium (SiGe) heterojunction bipolar transistor low noise amplifiers (LNAs) implemented in a commercially-available 130 nm SiGe BiCMOS platform.
Bardin, Joseph C.   +7 more
core   +1 more source

Reduced Muscular Carnosine in Proximal Myotonic Myopathy—A Pilot 1H‐MRS Study

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Myotonic dystrophy type 2 (proximal myotonic myopathy, PROMM) is a progressive multisystem disorder with muscular symptoms (proximal weakness, pain, myotonia) and systemic manifestations such as diabetes mellitus, cataracts, and cardiac arrhythmias.
Alexander Gussew   +11 more
wiley   +1 more source

Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence

open access: yesAerospace, 2023
This paper presents an experimental investigation into the effects of turbulence ingestion on the aerodynamic noise characteristics of rotor blades in edgewise flight. A small-scaled, two-bladed rotor was used in the study.
Nur Syafiqah Jamaluddin   +4 more
doaj   +1 more source

Sources, control, and effects of noise from aircraft propellers and rotors [PDF]

open access: yes, 1981
Source noise predictions are compared with measurements for conventional low-speed propellers, for new high speed propellers (propfans), and for a helicopter.
Dempsey, T. K.   +2 more
core   +2 more sources

Broadband squeezing of quantum noise in a Michelson interferometer with Twin-Signal-Recycling

open access: yes, 2009
Twin-Signal-Recycling (TSR) builds on the resonance doublet of two optically coupled cavities and efficiently enhances the sensitivity of an interferometer at a dedicated signal frequency.
André Thüring   +15 more
core   +1 more source

Entanglement degradation in the solid state: interplay of adiabatic and quantum noise [PDF]

open access: yes, 2010
We study entanglement degradation of two non-interacting qubits subject to independent baths with broadband spectra typical of solid state nanodevices.
Bellomo, B.   +5 more
core   +2 more sources

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

open access: yesAdvanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie   +4 more
wiley   +1 more source

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