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Low Frequency Airplane Noise Measurement

Xiao Di, Claus H. Hetzer, Ronald A. Wagstaff, and Kenneth E. Gilbert National Center for Physical Acoustics University of Mississippi, University, MS 38677 xiaodi@olemiss.edu November 3, 2008 Work Supported By The U.S. Army TACOM-ARDEC at Picatinny Arsenal, New Jersey.

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Low Frequency Airplane Noise Measurement

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  1. Xiao Di, Claus H. Hetzer, Ronald A. Wagstaff, and Kenneth E. Gilbert National Center for Physical Acoustics University of Mississippi, University, MS 38677 xiaodi@olemiss.edu November 3, 2008 Work Supported By The U.S. Army TACOM-ARDEC at Picatinny Arsenal, New Jersey Low Frequency Airplane Noise Measurement

  2. Experiment Site: Memphis Airport April - July, 2007

  3. Fedex Plane Preparing Landing(video)

  4. Fedex Plane Landing at 11 Am

  5. Fedex Plane Overhead & Landing at 1 PM

  6. Summary • Airplane landing generated infrasound sound detected (60 dB-70 dB) at distance of 2 to 3 miles (over 75 occasions) • Mechanism? Wingtip vortices Reverse Thrust Flaps and Spoilers • More Experiments Are Planned

  7. QUESTIONS ?

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