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infrasonic |
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infrasonic [¦in·frə¦sän·ik] (acoustics) Pertaining to signals, equipment, or phenomena involving frequencies below the range of human hearing, hence below about 15 hertz. Also known as subsonic (deprecated usage). How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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It is also important to note that development of advanced weapon systems is proceeding along the lines of using not only traditional but also basically new physical principles: information warfare, laser, photon, infrasonic and ultra-high frequency radiation whose application is the most effective from space based platforms. Besides analyzing video footage turned in from amateur astronomers and space flight enthusiasts, investigators are looking at defense radar records, telescope images and infrasonic data from the National Oceanic and Atmospheric Administration. Performance Standards for Sonic, Infrasonic, and Ultrasonic Radiation-Emitting Products. |
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