Far Term Noise Reduction Roadmap for the NASA D8 and Single-Aisle Tube-And-Wing Aircraft Concepts [PDF]
A portfolio of noise reduction technologies is applied to two advanced single-aisle class vehicle concepts in order to evaluate the prospects for these aircraft to meet the NASA Far Term noise goals, beyond 2035.
Clark, Ian A. +2 more
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Acoustics Division recent accomplishments and research plans [PDF]
The research program currently being implemented by the Acoustics Division of NASA Langley Research Center is described. The scope, focus, and thrusts of the research are discussed and illustrated for each technical area by examples of recent technical ...
Clark, L. R., Morgan, H. G.
core +1 more source
Discontinuous Galerkin Methods for Solving Acoustic Problems [PDF]
, 2015 Parciální diferenciální rovnice hrají důležitou v inženýrských aplikacích. Často je možné tyto rovnice řešit pouze přibližně, tj. numericky. Z toho důvodu vzniklo množství diskretizačních metod pro řešení těchto rovnic.
Nytra, Jan
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Integrated Evaluation of the Aeroacoustics and Psychoacoustics of a Single Propeller. [PDF]
Int J Environ Res Public Health, 2023 Sun J, Yonezawa K, Shima E, Liu H.
europepmc +1 more source
Characterization of the Wing Tone around the Antennae of a Mosquito-like Model
FluidsMosquitoes’ self-generated air movements around their antennae, especially at the wing-beat frequency, are crucial for both obstacle avoidance and mating communication. However, the characteristics of these air movements are not well clarified.
Yongtao Wang, Zhiteng Zhou, Zhuoyu Xie
doaj +1 more source
Assessment of Unsteady Propagation Characteristics and Corrections in Aeroacoustic Wind Tunnels Using an Acoustic Pulse [PDF]
Two types of aeroacoustic wind tunnel test section configurations have been tested in the NASA Langley Quiet Flow Facility. The first is a more traditional open-jet configuration, where test section flow passes unbounded through the facility anechoic ...
Bahr, Christopher +2 more
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An Investigation of Acoustic Back-Coupling in Human Phonation on a Synthetic Larynx Model. [PDF]
Bioengineering (Basel), 2023 Näger C +4 more
europepmc +1 more source
Recent Langley helicopter acoustics contributions [PDF]
The helicopter acoustics program at NASA Langley has included technology for elements of noise control ranging from sources of noise to receivers of noise. The scope of Langley contributions for about the last decade is discussed.
Morgan, Homer G. +2 more
core +1 more source
Networked Array Recorder (NeAR) Microphones for Field-Deployed Phased Arrays [PDF]
An innovative edge-computing concept known as NeAR (Networked Array Recorder) has been developed to provide enhancements to existing field-deployable microphone phased arrays utilized for aeroacoustic flyover measurements of airframe and propulsive noise
Cull.iton, William G. +1 more
core +1 more source
The Simulation Of Slat Noise Applying Stochastic Sound Sources Based On Solenoidal Digital Filters (SDF) [PDF]
, 2005 A new fast and cheap stochastic approach is introduced to model the unsteady turbulent sound sources in the slat-cove of a high-lift airfoil. It is based on the spatial filtering of a random white-noise field and incoporates information about the ...
Ewert, Roland
core