Research Catalog
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Displaying 1-24 of 24 results
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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/gpo70683
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