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Structural Response to Low Amplitude Sonic BoomsTwo highly instrumented homes have been ensonified by low amplitude sonic booms. The resulting measurements have been analyzed 1) to gain insight to the dominant physical acoustics associated with sonic booms heard indoors, and 2) to rank order the mechanisms needed for high quality auralizations. The mechanisms turn out to be both clear and elegant. Diffraction loading on the exterior surface is as expected with an enhancement around ka = 1 on the incident side of the home, and a strong shadow zone at higher non-dimensional frequencies. The resulting pressure loading induces modal vibration of the walls, ceiling and windows; each of which show their first flexural modes at frequencies below 20 Hz. The walls themselves appear to break up into multi-layered wave bearing structures around 100 Hz, above which the nonlinear contact and sliding mechanisms take on a dominant role in the signature. These insights have been combined to motivate a low dimensional tool for auralizing the complete audio bandwidth of booms heard indoors.
Document ID
20200010734
Acquisition Source
Langley Research Center
Document Type
Abstract
Authors
Joseph R Gavin
(Gulfstream Aerospace Savannah, Georgia, United States)
Jacob Klos
(Langley Research Center Hampton, United States)
Alexandra Loubeau
(Langley Research Center Hampton, United States)
Brenda M Sullivan
(Lockheed Martin (United States) Bethesda, United States)
Date Acquired
May 20, 2020
Publication Date
April 19, 2010
Subject Category
Acoustics
Report/Patent Number
NF1676L-9827
Meeting Information
Meeting: 159th Meeting of the Acoustical Society of America
Location: Baltimore, MD
Country: US
Start Date: April 19, 2010
End Date: April 23, 2010
Sponsors: Acoustical Society of America
Funding Number(s)
WBS: 984754.02.07.07.18.02
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
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