What is Infrasound?
[[File:Infrasound Arrays.jpg|thumb|Infrasound arrays at infrasound monitoring station in [[Qaanaaq]], Greenland.]] '''Infrasound''' is a type of [[sound]] with a [[frequency]] lower than humans can [[Hearing|hear]]. This frequency is lower than 20 [[hertz]]. When the frequency is lower but the [[Loudness|volume]] is loud enough, humans can feel the [[vibration]]s but cannot hear the infrasound. Younger people have the ability to hear lower and higher frequencies. Some animals including [[whale]]<nowiki/>s and [[elephant]]<nowiki/>s can communicate long distances by infrasound. ==Related pages== *[[Ultrasound]] {{sci-stub}} [[Category:Sound]]