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William M. Humphreys

Supervisory Electronics Engineer
Phone: 757-864-4601

Email:  william.m.humphreys@nasa.gov
Education:
  • B.S., Electrical Engineering, Old Dominion University, 1986
  • M.E., Electrical Engineering, Old Dominion University, 1993
Projects:
Development of Phased Microphone Arrays (PMA’s) for ground and
flight testing
Research Interests:

Aeroacoustic measurement technology (microphone arrays), optical diagnostics, signal processing algorithm development and implementation, analog electronics design, uncertainty analysis
Affiliations:
  • Member, Institute of Electrical and Electronics Engineers, Inc.
  • Senior Member, American Institute of Aeronautics and Astronautics
PUBLICATIONS:

1) Formal Refereed Publications:

  1. Merino-Martinez, R. et al., “A Review of Acoustic Imaging Methods Using Phased Microphone Arrays”, CEAS Aeronautical Journal, Volume 10 (1), pp. 197-230, 2019.

  2. 2. Hutcheson, F. V., Brooks, T. F., and Humphreys, W. M., Jr., “Noise Radiation from a Continuous Mold-Line Link Flap Configuration”, International Journal of Aeroacoustics, Volume 10 (5), pp. 565-588, 2011.

  3. Radcliffe, E., Naguib, A., and Humphreys, W. M., Jr., "A Novel Design of a Feedback-Controlled Optical Microphone for Aeroacoustics Research", Measurement Science and Technology, Volume 21 (10), 2010.

  4. Shah, P. N., Mobed, D., Spakovszky, Z. S., Brooks, T. F., and Humphreys, W. M., Jr., "Aeroacoustics of Drag-Generating Swirling Exhaust Flows", AIAA Journal, Volume 48 (4), 2010, pp. 719-727.

  5. Humphreys, W. M., Jr., and Brooks, T. F., “Noise Spectra and Directivity for a Scale-Model Landing Gear”, International Journal of Aeroacoustics, Volume 8 (5), pp. 409-443, 2009.

  6. 6. Burley, C. L., Brooks, T. F., Humphreys, W. M., Jr., and Rawls, J. W., “ANOPP Landing-Gear Noise Prediction with Comparison to Model-Scale Data”, International Journal of Aeroacoustics, Volume 8 (5), pp. 445-475, 2009.

  7. Hudy, L. M., Naguib, A., and Humphreys, W. M., Jr., "Stochastic Estimation of a Separated-Flow Field Using Wall-Pressure-Array Measurements", Physics of Fluids, Volume 19, 2007.

  8. Brooks, T. F., and Humphreys, W. M., Jr., "A Deconvolution Approach for the Mapping of Acoustic Sources (DAMAS) Determined from Phased Microphone Arrays", Journal of Sound and Vibration, Volume 294, 2006, pp. 856-879.

  9. Brooks, T. F., and Humphreys, W. M., Jr., "Flap-Edge Aeroacoustic Measurements and Predictions", Journal of Sound and Vibration, Volume 261 (1), 2003, pp. 31-74.

  10. Hudy, L. M., Naguib, A. M., and Humphreys, W. M., Jr., "Wall Pressure Array Measurements Beneath a Separating / Reattaching Flow Region", Physics of Fluids, Volume 15 (3), 2003, pp. 706 - 717.

  11. Mendoza, J. M., Brooks, T. F., and Humphreys, W. M., Jr., "An Aerodynamic Study of a Leading Edge Slat Configuration", International Journal of Aeroacoustics, Volume 1 (3), 2002, pp. 241-274.

  12. Humphreys, W. M., Jr., and Naguib, A. M., "Comparative Study of Image Compression Techniques for Digital Particle Image Velocimetry", AIAA Journal, Volume 40 (6), 2002, pp. 1026-1036.

  13. Pellett, G. L., Isaac, K. M., Humphreys, W. M., Jr., Gartrell, L. R., Roberts, W. L., Dancey, C. L., and Northam, G. B., "Velocity and Thermal Structure, and Strain-Induced Extinction of 14 to 100% Hydrogen-Air Counterflow Diffusion Flames", Combustion and Flame, Volume 112, 1998, pp. 575-592.

  14. Hunter, W. W., Jr., Gartrell, L. R., Humphreys, W. M., Jr., Witte, D. W., and Nichols, C. E., "Development and Assessment of an LDV System for Mach 6 Flow Field Measurements", New Trends in Instrumentation for Hypersonic Research, A. Boutier (ed.), 1993, pp. 337-346.

2) Referenceable Oral Presentations

  1. Khorrami, M. R., Lockard, D. P., Humphreys, W. M., Jr., and Ravetta, P. A., “Flight-Test Evaluation of Landing Gear Noise Reduction Technologies”, AIAA Paper 2019-2455, 25th AIAA/CEAS Aeroacoustics Conference, Delft, The Netherlands, 2019.

  2. Culliton, W. G., and Humphreys, W. M., Jr., “Networked Array Recorder (NeAR) Microphones for Field-Deployed Phased Arrays”, AIAA Paper 2019-3290, AIAA Aviation 2019 Forum, Dallas, TX, 2019.

  3. Dolph, C., McSwain, R. G., Humphreys, W. M., Jr., Lockard, D. P., and Khorrami, M. R., “Optical Geolocation for Small Unmanned Aerial System”, AIAA Paper 2019-1055, AIAA SciTech 2019 Forum, San Diego, CA, 2019.

  4. Khorrami, M. R., Lockard, D. P., Humphreys, W. M., Jr., and Ravetta, P. A., “Flight-Test Evaluation of Airframe Noise Mitigation Technologies”, AIAA Paper 2018-2972, 2018 AIAA/CEAS Aeroacoustics Conference, Atlanta, GA, 2018.

  5. Fahringer, T. W., Thurow, B. S., Humphreys, W. M., Jr., and Bartram S. M., “Comparison of Stereo-PIV and Plenoptic-PIV Measurements on the Wake of a Cylinder in NASA Ground Test Facilities”, AIAA Paper 2017-0023, 55th AIAA Aerospace Sciences Meeting, Grapevine, TX, 2017.

  6. Humphreys, W. M., Jr., Lockard, D. P., Khorrami, M. R., Culliton, W. G., and McSwain, R. G., “Evaluation of Methods for In-Situ Calibration of Field-Deployable Microphone Phased Arrays”, AIAA Paper 2017-4176, 23rd AIAA/CEAS Aeroacoustics Conference, Denver, CO, 2017.

  7. Bahr, C. J., Humphreys, W. M., Jr., Ernst, D., Ahlefeldt, T., Spehr, C., Pereira, A., Leclere, Q., Picard, C., Porteous, R., Moreau, D., Fischer, J. R., and Doolan, C. J., “A Comparison of Microphone Phased Array Methods Applied to the Study of Airframe Noise in Wind Tunnel Testing”, 23rd AIAA/CEAS Aeroacoustics Conference, Denver, CO, 2017.

  8. Humphreys, W. M., Jr., Lockard, D. P., Khorrami, M. R., Culliton, W. G., McSwain, R. G., Ravetta, P. A., and Johns, Z., “Development and Calibration of a Field-Deployable Microphone Phased Array for Propulsion and Airframe Noise Flyover Measurements”, AIAA Paper 2016-2898, 22nd AIAA/CEAS Aeroacoustics Conference, Lyon, France, 2016.

  9. Lockard, D. P., Humphreys, W. M., Jr., Khorrami, M. R., Fares, E., Casalino, D., and Ravetta, P. A., “Comparison of Computational and Experimental Microphone Array Results for an 18%-Scale Aircraft Model”, 21st AIAA/CEAS Aeroacoustics Conference, Dallas, TX, 2015.

  10. Humphreys, W. M., Jr., Khorrami, M. R., Lockard, D. P., Neuhart, D. H., and Bahr, C. J., “Characterization of Flap Edge Noise Radiation from a High-Fidelity Airframe Model”, AIAA Paper 2015-2991, 21st AIAA/CEAS Aeroacoustics Conference, Dallas, TX, 2015.

  11. Khorrami, M. R., Humphreys, W. M., Jr., and Lockard, D. P., “An Assessment of Flap and Main Landing Gear Noise Abatement Concepts”, AIAA Paper 2015-2987, 21st AIAA/CEAS Aeroacoustics Conference, Dallas, TX, 2015.

  12. Humphreys, W. M., Jr., Brooks, T. F., Bahr, C. J., Spalt, T. B., Bartram, S. M., Culliton, W. G., and Becker, L. E., “Development of a Microphone Phased Array Capability for the Langley 14- by 22-foot Subsonic Tunnel”, AIAA-2014-2343, 20th AIAA/CEAS Aeroacoustics Conference, Atlanta, GA, 2014.

  13. Bahr, C. J., Brooks, T. F., Humphreys, W. M., Jr., Spalt, T. B., and Stead, D. J., “Acoustic Data Processing and Transient Signal Analysis for the Hybrid Wing Body 14- by 22-foot Subsonic Wind Tunnel Test”, AIAA-2014-2345, 20th AIAA/CEAS Aeroacoustics Conference, Atlanta, GA, 2014.

  14. Khorrami, M. R., Humphreys, W. M., Jr., Lockard, D. P., and Ravetta, P. A., “Aeroacoustic Evaluation of Flap and Landing Gear Noise Reduction Concepts”, AIAA-2014-2478, 20th AIAA/CEAS Aeroacoustics Conference, Atlanta, GA, 2014.

  15. Heath, S. L., et al., “Hybrid Wing Body Aircraft Acoustic Test Preparations and Facility Upgrades”, AIAA-2013-2623, 28th AIAA Aerodynamic Measurement Technology, Ground Testing, and Flight Testing Conference, San Diego, CA, 2013.

  16. Tedjojuwono, K. K., Clark, N., and Humphreys, W. M., Jr., “Optical Characterization of Window Materials for Aerospace Applications”, Proceedings of SPIE Optifab 2013, Rochester, NY, 2013.

  17. Brooks, T. F., Humphreys, W. M., Jr., and Plassman, G. E., "DAMAS Processing for a Phased Array Study in the NASA Langley Jet Noise Laboratory", AIAA Paper 2010-3780, 16th AIAA/CEAS Aeroacoustics Conference, Stockholm, Sweden, 2010.

  18. Middleton, T. F., Balla, R. J, Baurle, R. A., Humphreys, W. M., Jr., and Wilson, L. G., "The NASA Langley Isolator Dynamics Research Lab", JANNAF Conference, 2009.

  19. Humphreys, W. M., Jr., and Culliton, W. G., "An Autonomous Sensor System Architecture for Active Flow and Noise Control Feedback", AIAA Paper 2008-3935, 26th AIAA Aerodynamic Measurement Technology and Ground Testing Conference, Seattle, WA, 2008.

  20. Hutcheson, F. V., Brooks, T. F., and Humphreys, W. M., Jr., "Noise Radiation from a Continuous Mold-Line Link Flap Configuration", AIAA Paper 2008-, 14th AIAA/CEAS Aeroacoustics Conference, Vancouver, Canada, 2008.

  21. Khorrami, M. R., Lockard, D. P., Humphreys, W. M., Jr., Choudhari, M. M., and Van de Ven, T., "Preliminary Analysis of Acoustic Measurements from the NASA-Gulfstream Airframe Noise Flight Test", AIAA Paper 2008-2814, 14th AIAA/CEAS Aeroacoustics Conference, Vancouver, Canada, 2008.

  22. Humphreys, W. M., Jr., and Brooks, T. F., "Noise Spectra and Directivity for a Scale-Model Landing Gear", AIAA Paper 2007-3458, 13th AIAA/CEAS Aeroacoustics Conference, Rome, Italy, 2007.

  23. Burley, C. L., Brooks, T. F., Humphreys, W. M., Jr., and Rawls, J. W., Jr., "ANOPP Landing Gear Noise Prediction Comparisons to Model-Scale Data", AIAA Paper 2007-3459, 13th AIAA/CEAS Aeroacoustics Conference, Rome, Italy, 2007.

  24. Shah, P. N., Mobed, D., Spakovszky, Z. S., Brooks, T.F, and Humphreys, W. M., Jr., "Aero-Acoustics of Drag Generating Swirling Exhaust Flows", AIAA Paper 2007-3714, 13th AIAA/CEAS Aeroacoustics Conference, Rome, Italy, 2007.

  25. Brooks, T. F., and Humphreys, W. M., Jr., "Extension of DAMAS Phased Array Processing for Spatial Coherence Determination (DAMAS-C)", AIAA Paper 2006-2654, 12th AIAA/CEAS Aeroacoustics Conference, Cambridge, MA, 2006.

  26. Hudy, L. M., Naguib, A., and Humphreys, W. M., Jr., "Stochastic Estimation of a Separated-Flow Field using Wall-pressure-array Measurements", AIAA Paper 2006-1115, 44th AIAA Aerospace Sciences Meeting, Reno, NV, 2006.

  27. Humphreys, W. M., Jr., Shams, Q. A., Graves, S. S., Sealey, B. S., Bartram, S. M., and Comeaux, T., "Application of MEMS Microphone Array Technology to Airframe Noise Measurements", AIAA Paper 2005-3004, 11th AIAA / CEAS Aeroacoustics Conference, Monterey, CA, 2005.

  28. Brooks, T. F., and Humphreys, W. M., Jr., "Three-Dimensional Application of DAMAS Methodology for Aeroacoustic Noise Source Definition", AIAA Paper 2005-2960, 11th AIAA / CEAS Aeroacoustics Conference, Monterey, CA, 2005.

  29. Booth, E. R., and Humphreys, W. M., Jr., "Tracking and Characterization of Aircraft Wakes using Acoustic and Lidar Measurements", AIAA Paper 2005-2964, 11th AIAA / CEAS Aeroacostics Conference, Monterey, CA, 2005.

  30. Hudy, L. M., Naguib, A. M., Humphreys, W. M., Jr. and Bartram, S. M., "Particle Image Velocimetry Measurements of a Two/Three-Dimensional Separating/Reattaching Boundary Layer Downstream of an Axisymmetric Backward-Facing Step", AIAA Paper 2005-0114, 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 2005.

  31. Brooks, T. F., and Humphreys, W. M., Jr., "A Deconvolution Approach for the Mapping of Acoustic Sources (DAMAS) Determined from Phase Microphone Arrays", AIAA Paper 2004-2954, 10th AIAA / CEAS Aeroacoustics Conference, Manchester, U.K., 2004.

  32. Armstrong, C. D., Humphreys, W. M., Jr., and Fijany, A., "The Development of Design Tools for Fault Tolerant Quantum Dot Cellular Automata Based Logic", Proceedings of the 2nd International Workshop on Quantum Dots for Quantum Computing and Classical Size Effect Circuits, Notre Dame, IN, 2003.

  33. Humphreys, W. M., Jr., Gerhold, C. H., Zuckerwar, A. J., Herring, G. C., and Bartram, S. M., "Performance Analysis of a Cost-Effective Electret Condenser Microphone Directional Array", AIAA Paper 2003-3195, 9th AIAA / CEAS Aeroacoustics Conference and Exhibit, Hilton Head, SC, 2003.

  34. Fleming, G. A., Bartram, S. M., Humphreys, W. M., Jr., Jenkins, L., Jordan, J. D., Lee, J. W., Leighty, B. D., Meyers, J. F., and South, B. W., "Unified Instrumentation: Examining the Simultaneous Application of Advanced Measurement Techniques for Increased Wind Tunnel Testing Capability", AIAA Paper 2002-3244, 22nd AIAA Aerodynamics Measurement Technology and Ground Testing Conference, St. Louis, MO, 2002.

  35. Naguib, A. M., Hudy, L. M., and Humphreys, W. M., Jr., "Stochastic Estimation and Non-Linear Wall-Pressure Sources in a Separating / Reattaching Flow", Proceedings of 2002 ASME Fluids Engineering Summer Meeting, Montreal, Canada, 2002.

  36. Hudy, L. M., Naguib, A. M., Humphreys, W. M., Jr., and Bartram, S. M., "Wall Pressure Array Measurements Beneath a Separating / Reattaching Flow Region", AIAA Paper 2002-0579, 40th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 2002.

  37. Humphreys, W. M., Jr., and Bartram, S. M., "Measurement of Separated Flow Structures Using a Multiple-Camera DPIV System", Proceedings from the 19th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF), Cleveland, OH, 2001.

  38. Humphreys, W. M., Jr., and Naguib, A. M., "A Comparative Study of Image Compression Techniques for Digital Particle Image Velocimetry", AIAA Paper 2001 0695, 39th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 2001.

  39. Brooks, T. F., and Humphreys, W. M., Jr., "Flap Edge Aeroacoustic Measurements and Predictions", AIAA Paper 2000-1975, 6th AIAA/CEAS Aeroacoustics Conference, Lahaina, HI, 2000.

  40. Brooks, T. F., and Humphreys, W. M., Jr., "Effect of Directional Array Size on the Measurement of Airframe Noise Components", AIAA Paper 99-1958, 5th AIAA/CEAS Aeroacoustics Conference, Bellevue, WA, 1999.

  41. Humphreys, W. M., Jr., Bartram, S. M., Parrott, T. L., and Jones, M. G., "Digital PIV Measurements of Acoustic Particle Displacements in a Normal Incidence Impedance Tube", AIAA Paper 98-2611, 20th Advanced Measurement and Ground Testing Technology Conference, Albuquerque, NM, 1998.

  42. Humphreys, W. M., Jr., Brooks, T..F., Hunter, W. W., Jr., and Meadows, K. R., "Design and Use of Microphone Directional Arrays for Aeroacoustic Measurements", AIAA Paper 98-0471, 36th Aerospace Sciences Meeting and Exhibit, Reno, NV, 1998.

  43. Meadows, K. R., Brooks, T. F., Humphreys, W. M., Jr., Hunter, W. W., Jr., and Gerhold, C. H., "Aeroacoustic Measurements of a Wing-Flap Configuration", AIAA Paper 97-1595, 3rd AIAA/CEAS Aeroacoustics Conference, Atlanta, GA, 1997.

  44. Humphreys, W. M., Jr., Bartram, S. M., and Clark, I. O., "Velocity Field Measurements in a Chemical Vapor Deposition Reactor Using Digital Particle Image Velocimetry", Proceedings from the ASME Symposium on Laser Anemometry and Experimental and Numerical Flow Visualization, San Diego, CA, 1996.

  45. Humphreys, W. M., Jr., and Bartram, S. M., "Using Particle Image Velocimetry in Difficult Facilities: Some Lessons Learned", AIAA Paper 96-2267, 19th Advanced Measurement and Ground Testing Conference, New Orleans, LA, 1996.

  46. Pellett, G. L., Wilson, L. G., Humphreys, W. M., Jr., Bartram, S. M., Gartrell, L. G., and Isaac, K. M., "Velocity Fields of Axisymmetric Hydrogen-Air Counterflow Diffusion Flames from LDV, PIV, and Numerical Computation", AIAA Paper 95-3112, AIAA 31st Joint Propulsion Conference, San Diego, CA, 1995.

  47. Pellett, G. L., Roberts, W. L., Wilson, L. G., Weinstein, L. M., Humphreys, W. M., Jr., Bartram, S. M., and Isaac, K. M., "Use of Focusing Schlieren, Shadowgraph, PIV, and Thermocouples to Define the Structure of Hydrogen-Air Counterflow Diffusion Flames", AIAA Paper 94-2300, 18th AIAA Aerospace Ground Testing Conference, Colorado Springs, CO, 1994.

  48. Blackshire, J. L., Humphreys, W. M., Jr., and Bartram, S. M., "3-dimensional, 3-component Velocity Measurements Using Holographic Particle Image Velocimetry (HPIV)", AIAA Paper 94-2645, 18th AIAA Aerospace Ground Testing Conference, Colorado Springs, CO, 1994.

  49. Humphreys, W. M., Jr., Kjelgaard, S. O., and Bartram, S. M., "A Time-Resolved Particle Image Velocimeter for Unsteady Flow Field Studies", Proceedings from the ASME Fluids Engineering Division Summer Meeting, Lake Tahoe, NV, 1994.

  50. Humphreys, W. M., Jr., Rallo, R. A., Hunter, W. W., Jr., Bartram, S. M., and Blackshire, J. L., "Application of Particle Image Velocimetry to Mach 6 Flows", Proceedings from 5th International Conference on Laser Anemometry--Advances and Applications, Veldhoven, The Netherlands, 1993, pp. 519-526.

  51. Humphreys, W. M., Jr., and Bartram, S. M., "A Survey of Particle Image Velocimetry Applications in Langley Aerospace Facilities", AIAA Paper 93-0411, 31st Aerospace Sciences Meeting, Reno, NV, 1993.

  52. Antcliff, R. R., Balla, R. J., and Humphreys, W. M., Jr., "Combustion Diagnostics at NASA Langley Research Center", Proceedings from the 3rd International Symposium on Special Topics in Chemical Properties, The Netherlands, 1992.

  53. Humphreys, W. M., Jr., "A Histogram-Based Technique for Rapid Vector Extraction from PIV Photographs", Proceedings from the 4th International Conference on Laser Anemometry--Advances and Applications, Cleveland, OH, 1991, pp. 279-288.

  54. Humphreys, W. M., Jr., and Gartrell, L. R., "Comparison of Laser Transit Anemometry Data Analysis Techniques", Proceedings from the 14th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF), Rockville, MD, 1991, pp. 336-347.

  55. Humphreys, W. M., Jr., "Estimating Laser Transit Anemometry Noise Performance Capabilities", Proceedings from the 13th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF), Gottingen, Germany, 1989, pp. 129-141.

  56. Humphreys, W. M., Jr., and Hunter, W. W., Jr., "Evaluation of Concepts and Methods for Extraction of Flow Parameters from Laser Transit Anemometry Data", Proceedings from the 1988 International Conference on Applications of Lasers and Electro-Optics (ICALEO), Santa Clara, CA, 1988, pp. 24-35.

3) Other Publications

  1. Humphreys, W. M., Jr., “Microphone Phased Array NetCDF/HDF5 Archival Files: Application Program Interface Reference”, NASA Technical Memorandum 2019-220402, 2019.

  2. Humphreys, W. M., Jr. (editor), “Aerodynamic Measurement Technology”, Aerospace America, December, 1998, pp. 14.

  3. 3. Humphreys, W. M., Jr. (editor), “Aerodynamic Measurement Technology”, Aerospace America, December, 1997, pp. 11.

  4. Hunter, W. W., Jr., Humphreys, W. M., Jr., and Meyers, J. F., "Application of Point and Global Laser Velocimeter Techniques to Supersonic Flow", Proceedings of the 80th Supersonic Tunnel Association, Koln, Germany, 1993.

  5. Humphreys, W. M., Jr., and Bartram, S. M., “Velocity Measurements of Unsteady Flow Using Particle Image Velocimetry”, Langley Research and Technology Highlights, NASA Technical Memorandum 4575, 1993, pp. 10-11.

  6. Humphreys, W. M., Jr., Blackshire, J. L., and Bartram, S. M., “Volumetric Three-Dimensional Velocity-Field Measurements Using Holographic Particle Image Velocimetry”, Langley Research and Technology Highlights, NASA Technical Memorandum 4575, 1993, pp. 10.

  7. Humphreys, W. M., Jr., “Hydrogen Combustion Velocity Measurements Using Particle Image Velocimetry”, Langley Research and Technology Highlights, NASA Technical Memorandum 4452, 1992, pp. 9-10.

  8. Humphreys, W. M., Jr., Hunter, W. W., Jr., Covell, P. J., and Nichols, C. E., "Laser Transit Anemometer Measurements on a Slender Cone in the Langley Unitary Plan Wind Tunnel", NASA Technical Memorandum 102775, 1990.

  9. Humphreys, W. M., Jr., and Hunter, W. W., Jr., “Development of Particle Image Velocimeter for Rapid Global Flow Field Mapping”, Langley Research and Technology Highlights, NASA Technical Memorandum 4243, 1990, pp. 207.

  10. Humphreys, W. M., Jr., and Hunter, W. W., Jr., “Evaluating Laser Transit Anemometry Performance Capabilities”, Langley Research and Technology Highlights, NASA Technical Memorandum 4150, 1989, pp. 54-55.

  11. Humphreys, W. M., Jr., Covell, P. F., Nichols, C. E., Jr., and Hunter, W. W., Jr., “Laser Transit Anemometer Evaluation”, Langley Aerospace Test Highlights, NASA Technical Memorandum 101579, 1988, pp. 39.

  12. Hunter, W. W., Jr., and Humphreys, W. M., Jr., "Laser Transit Anemometer Experiences in Supersonic Flow", Proceedings of 70th Supersonic Tunnel Association, Lancashire, England, 1988.

4) Presentations

  1. Humphreys, W. M., Jr., “NASA Langley Research Center: Overview and Opportunities”, Invited Keynote Lecture,2014 Vermont Space Grant Consortium Awards Ceremony, 2014.

  2. Humphreys, W. M., Jr., Lockard, D. P., and Khorrami, M. R., "Airframe Noise Flight Test Measurements Using an Electret Condenser Microphone Array", Invited Lecture, 159th Meeting of the Acoustical Society of America, Baltimore, MD, 2010.

  3. Humphreys, W. M., Jr., Shams, Q. A., Graves, S. S., Bartram, S. M., Sealey, B. S., and Comeaux, T., "Development of MEMS Microphone Array Technology for Aeroacoustic Testing", Invited Lecture, 148th Meeting of the Acoustical Society of America, San Diego, CA, 2004.

  4. Humphreys, W. M., Jr., "Aeroacoustic Testing Using Directional Microphone Arrays", Invited Lecture, LaRC Wind Tunnel University, 2000.

  5. Humphreys, W. M., Jr., "Introduction to Particle Image Velocimetry", Invited Lecture, LaRC Wind Tunnel University, 2000.

  6. Humphreys, W. M., Jr., "Review of Mie-Based Nonintrusive Diagnostics Research at LaRC", Invited Lecture, Marshall Space Flight Center Structures and Dynamics Laboratory, 1994.

  7. Humphreys, W. M., Jr., "Overview of LaRC Particle Image Velocimetry Research", Invited Lecture, Wichita State University, 1991.

 

 
   
 
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