NDLI: Computer program to predict aircraft noise levels

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Computer program to predict aircraft noise levels

Content Provider	NASA Technical Reports Server (NTRS)
Author	Clark, B. J.
Copyright Year	1981
Description	Methods developed at the NASA Lewis Research Center for predicting the noise contributions from various aircraft noise sources were programmed to predict aircraft noise levels either in flight or in ground tests. The noise sources include fan inlet and exhaust, jet, flap (for powered lift), core (combustor), turbine, and airframe. Noise propagation corrections are available for atmospheric attenuation, ground reflections, extra ground attenuation, and shielding. Outputs can include spectra, overall sound pressure level, perceived noise level, tone-weighted perceived noise level, and effective perceived noise level at locations specified by the user. Footprint contour coordinates and approximate footprint areas can also be calculated. Inputs and outputs can be in either System International or U.S. customary units. The subroutines for each noise source and propagation correction are described. A complete listing is given.
File Size	7829927
Page Count	147
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19810025404
Archival Resource Key	ark:/13960/t7sn51213
Language	English
Publisher Date	1981-09-01
Access Restriction	Open
Subject Keyword	Acoustics Airframes Engine Noise Jet Aircraft Noise Flaps Control Surfaces Noise Prediction Aircraft Atmospheric Attenuation Sound Intensity Intake Systems Turbines Computer Programs Level Quantity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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