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: [[Human]]s cannot [[hear]] [[frequency|frequencies]] below 20Hz because their [[Ear Drum|ear drums]] are too small.
: Large [[animal]]s such as [[whale]]s and [[elephant]]s can [[hear]] [[infrasound]] because their [[Ear Drum|ear drum]]s are larger than [[human]] [[Ear Drum|ear drum]]s.
: [[Infrasound]] detectors can be used to track large [[animal]]s which communicate using [[infrasound]].
: [[P-wave]]s are [[infrasound]] and a type of [[Seismic Wave|seismic wave]] caused by [[earthquake]]s.
: [[Infrasound]] detectors can help locate the source of an [[earthquake]].