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Examples
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"Infrasound" is sound at frequencies below approx.
Boing Boing: September 18, 2005 - September 24, 2005 Archives 2005
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Infrasound recordings of the blast suggest a small asteroid hitting Earth's atmosphere and exploding with an energy of 0.5 to 1 kiloton of TNT.
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Infrasound is low frequency acoustic waves below the hearing threshold that have disturbing psychological effects.
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Regarding my Infrasound post below, Marc Laidlaw points us to this article about the discovery of sound waves from a supermassive black hole more than 250 million light years from Earth.
Boing Boing: September 7, 2003 - September 13, 2003 Archives 2003
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A little while ago, I wrote a short piece for SOUTHBANK magazine about a sort of concert-experiment in which the performers were planning to use a machine to produce Infrasound.
Archive 2005-04-01 Jessica 2005
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A little while ago, I wrote a short piece for SOUTHBANK magazine about a sort of concert-experiment in which the performers were planning to use a machine to produce Infrasound.
A warm welcome... Jessica 2005
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Infrasound can also be used to listen to volcanoes.
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Infrasound waves move slower than the speed of light but can travel for hundreds of miles and easily penetrate the earth as well as other material objects.
PhysOrg.com - latest science and technology news stories PhysOrg Team 2010
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Infrasound hasn't been widely used to monitor volcanoes, according to noted volcano expert and SMU geology professor James E.
PhysOrg.com - latest science and technology news stories PhysOrg Team 2010
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Infrasound can't replace seismometers but may help scientists interpret volcanic signals, Quick said.
PhysOrg.com - latest science and technology news stories PhysOrg Team 2010
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