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Top: Science: Technology: Acoustics, Ultrasound and Vibration: Ultrasound (216)

DescriptionUltrasound is cyclic sound pressure with a frequency of 20 kilohertz or over, greater than the upper limit of human hearing.


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Last update: Apr 28, 2012 18:35:02. Phy.org is a private web site, powered by the Open Directory Project.