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Sound propagation over uneven ground and irregular topography [microform] : semiannual status report no. 4 / by Yves H. Berthelot ... [et al.].
Text
[Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1987]
1987
0 resources
Sound propagation over uneven ground and irregular topography [microform] : semiannual status report no. 3 / by James A. Kearns, Allan D. Pierce, and Geoffrey L. Main ; submitted to National Aeronautics and Space Administration, Langley Research Center.
Text
[Washington, D.C. : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1986]
1986
0 resources
Sound propagation over uneven ground and irregular topography [microform] : semiannual status report / by Allan D. Pierce ... [et al.] ; submitted to National Aeronautics and Space Administration, Langley Research Center.
Text
Hampton, Va. : The Center ; [Springfield, Va. : National Technical Information Service, distributor, 1986]
1986
0 resources
Method for extracting forward acoustic wave components from rotating microphone measurements in the inlets of turbofan engines [microform] / D.E. Cicon, T.G. Sofrin.
Text
[Washington, DC] : National Aeronautics and Space Administration ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
1995
0 resources
Time-dependent parabolic finite difference formulation for harmonic sound propagation in a two-dimensional duct with flow [microform] / Kenneth J. Baumeister and Kevin L. Kreider.
Text
[Washington, D.C. : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1996]
1996
0 resources
Validation of aircraft noise models at lower levels of exposure [microform] / Juliet A. Page ... [et al].
Text
Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
1996
0 resources
Numerical simulation of the effect of heating on supersonic jet noise [microform] / R. Hixon and S.-H. Shih, Reda R. Mankbadi.
Text
[Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1997]
1997
0 resources
Finite difference time marching in the frequency domain [microform] : a parabolic formulation for the convective wave equation / K.J. Baumeister, K.L. Kreider.
Text
[Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1996]
1996
0 resources
Sonic boom propagation codes validated by flight test [microform] / Hugh W. Poling.
Text
Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
1996
0 resources
Time correlations and the frequency spectrum of sound radiated by turbulent flows [microform] / Robert Rubinstein, Ye Zhou.
Text
Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1997]
1997
0 resources
Finite difference time marching in the frequency domain [microform] : a parabolic formulation for aircraft acoustic nacelle design / Kenneth J. Baumeister and Kevin L. Kreider.
Text
[Washington, D.C. : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1996]
1996
0 resources
A user's guide to the Zwikker-Kosten Transmission Line Code (ZKTL) [microform] / J.J. Kelly and H. Abu-Khajeel.
Text
Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; Springfield, VA : National Technical Information Service, distributor, [1997]
1997
0 resources
Development of improved surface integral methods for jet aeroacoustic predictions [microform] : final report, NASA-Langley grant no. NAG-1660 / Anthony R. Pilon, Anastasios S. Lyrintzis.
Text
[Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1997]
1997
0 resources
Emission of sound from turbulence convected by a parallel mean flow in the presence of a confining duct [microform] / Marvin E. Goldstein, Stewart J. Leib.
Text
[Cleveland, Ohio] : National Aeronautics and Space Administration, Glenn Research Center ; Springfield, VA : National Technical Information Service, distributor, [1999]
1999
0 resources
Numerical study of wave propagation in a non-uniform flow [microform] / Alex Povitsky.
Text
Hampton, VA : ICASE, NASA Langley Research Center ; Hanover, MD : Available from NASA Center for Aerospace Information, [2000]
2000
0 resources
Evaluation of the feasibility of scale modeling to quantify wind and terrain effects on low-angle sound propagation [microform] / G.S. Anderson, ... [et al.].
Text
Cambridge, MA : Bolt, Beranek and Newman, Inc. ; Hampton, VA : National Aeronautics and Space Administration, Langley Research Center, [1985]
1985
1 resource
Available online
http://purl.access.gpo.gov/GPO/LPS88247Turbofan aft duct suppressor study : contractor's data report of mode probe signal data / G. H. Fiske ... [and others].
Text
[Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center, [1983?]
1983
1 resource
Available online
https://purl.fdlp.gov/GPO/gpo25830Turbofan aft duct suppressor study [microform] : contractor's data report of mode probe signal data / G.H. Fiske ... [et al.].
Text
[Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center, [1983?]
1983
0 resources
Low-frequency sound propagation modeling over a locally-reacting boundary using the parabolic approximation / by J. S. Robertson, W. L. Siegmann and M. J. Jacobson.
Text
Troy, N.Y. : Department of Mathematical Sciences, Rensselaer Polytechnic Institute ; Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center, [1989]
1989
1 resource
Available online
https://purl.fdlp.gov/GPO/gpo29960Low-frequency sound propagation modeling over a locally-reacting boundary using the parabolic approximation [microform] / by J. S. Robertson, W. L. Siegmann and M. J. Jacobson.
Text
Troy, N.Y. : Department of Mathematical Sciences, Rensselaer Polytechnic Institute ; Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center, [1989]
1989
0 resources
Turbofan aft duct suppressor study / by A.A. Syed [and four others].
Text
Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center, [1983]
1983
1 resource
Available online
https://purl.fdlp.gov/GPO/gpo34889Turbofan aft duct suppressor study / by A.A. Syed [and four others].
Text
Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center, [1983]
1983
0 resources
Finite difference time marching in the frequency domain : a parabolic formulation for aircraft acoustic nacelle design / Kenneth J. Baumeister and Kevin L. Kreider.
Text
Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center, September 1996.
1996-9
1 resource
Available online
https://purl.fdlp.gov/GPO/gpo68473Time-dependent parabolic finite difference formulation for harmonic sound propagation in a two-dimensional duct with flow / Kenneth J. Baumeister and Kevin L. Kreider.
Text
Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center, November 1996.
1996-11
1 resource
Available online
https://purl.fdlp.gov/GPO/gpo70683No results found from Digital Research Books Beta
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