NDLI: Collection of infrasonic sound from sources of military importance

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Collection of infrasonic sound from sources of military importance

Content Provider	NASA Technical Reports Server (NTRS)
Author	Shams, Qamar A. Stihler, Craig Masterman, Michael Burkett, Cecil G. Zuckerwar, Allan J. Wallace, Jack
Copyright Year	2008
Description	Extreme Endeavors is collaborating with NASA Langley Research Center (LaRC) in the development, testing and analysis of infrasonic detection system under a Space Act Agreement. Acoustic studies of atmospheric events like convective storms, shear-induced turbulence, acoustic gravity waves, microbursts, hurricanes, and clear air turbulence (CAT) over the past thirty years have established that these events are strong emitters of infrasound. Recently NASA Langley Research Center has designed and developed a portable infrasonic detection system which can be used to make useful infrasound measurements at locations where it was not possible previously, such as a mountain crag, inside a cave or on the battlefield. The system comprises an electret condenser microphone, having a 3-inch membrane diameter, and a small, compact windscreen. Extreme Endeavors will present the findings from field testing using this portable infrasonic detection system. Field testing of the infrasonic detection system was partly funded by Greer Industries and support provided by the West Virginia Division of Natural Resources. The findings from this work illustrate the ability to detect structure and other information about the contents inside the caves. The presentation will describe methodology for utilizing infrasonic to locate and portray underground facilities.
File Size	921813
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20090012596
Archival Resource Key	ark:/13960/t2t48p36q
Language	English
Publisher Date	2008-08-19
Access Restriction	Open
Subject Keyword	Acoustics Field Tests Military Operations Portable Equipment Acoustic Measurement Infrasonic Frequencies Microphones Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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