ASE 363Q: Design and Testing of Aerospace Structures
Time Series Analysis of Anomalous Sounds
Sponsor: Lindy Tucker
Fall 1996 Design Team Members
Fall 1996 Design Team Advisor
Weekly Meeting Day and Time
Primary: Tuesday 11:30 am - 12:30 pm
Alternate: Thursday 11:30 am - 12:30 pm
Basic Approach
Read class notes provided on time series analysis and generalized harmonic analysis.
Read analyzer manual and carry out some simple exercises to obtain hands-on experience with modern time-series analyzers such as the HP 3567A in the lab.
Review documented news items and scientific papers published in the literature and in sections of the Condon Report associated with anomalous sounds.
Obtain amplitude time tracks of several Saw-Whet and Pigmy Owl sounds to obtain a statistical sampling of breath pauses and beep lengths.
Objectives
Investigate unexplained aerial acoustic phenomena from a scientific time-series analysis point of view.
Conduct basic Fourier spectral analysis and time domain analysis of measured signals and interpret results.
Analyze and characterize supplied recorded sound data with known natural sounds as identified on commercially available compact disks.
Review the possibilities of apparent sounds being radiated by electromagnetic waves as opposed to sound waves.
References
Schultz, Vajdos, and Webber, ASE 363Q Midterm and Final Reports: Wise Owl Industries - Investigation of Anomalous Sounds, Fall 1994.
Hawkins and Lugo, ASE 363Q Reports: Acoustic Sciences - Investigation of Anomalous Sounds, Spring 1994.
Various reports from other previous ASE 363Q groups.
HP Application Note 243: The Fundamentals of Signal Analysis.
Dr. Edward U. Condon, Scientific Study of Unidentified Flying Objects - The Complete Report Commissioned by the U.S. Air Force, New York, Bantam Books, 1968.
D. Regan and W. Allan, Investigation and Analysis of Sound Pulses Recorded During a Period of UFO Activity in Bragg Creek, Alberta, Canada, MUFON Symposium Proceedings, San Francisco, pp. 177-205.