Difference between revisions of "Ultrasound"
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(Created page with "'''Ultrasound''' is a cyclic sound pressure wave with a frequency greater than the upper limit of human hearing. Ultrasound is thus not separated...") |
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| − | '''Ultrasound''' is a cyclic [[sound]] pressure wave with a [[frequency]] greater than the upper limit of | + | '''Ultrasound''' is a cyclic [[sound]] pressure wave with a [[frequency]] greater than the upper limit of human hearing. Ultrasound is thus not separated from "normal" (audible) sound based on differences in physical properties, only the fact that humans cannot hear it. Although this limit varies from person to person, it is approximately 20 [[Hertz|kilohertz]] (20,000 hertz) in healthy, young adults. |
Latest revision as of 14:06, 27 August 2012
Ultrasound is a cyclic sound pressure wave with a frequency greater than the upper limit of human hearing. Ultrasound is thus not separated from "normal" (audible) sound based on differences in physical properties, only the fact that humans cannot hear it. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy, young adults.