Difference between revisions of "Infrasound"
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: [[Infrasound]] is any [[sound]] which is too low [[pitch]]ed to [[hear]]. Since the lowest [[frequency]] a [[human]] can hear 20Hz, then [[infrasound]] is any [[sound]] below that. | : [[Infrasound]] is any [[sound]] which is too low [[pitch]]ed to [[hear]]. Since the lowest [[frequency]] a [[human]] can hear 20Hz, then [[infrasound]] is any [[sound]] below that. | ||
: [[Human]]s cannot [[hear]] [[frequency|frequencies]] below 20Hz because their [[Ear Drum|ear drums]] are too small. | : [[Human]]s cannot [[hear]] [[frequency|frequencies]] below 20Hz because their [[Ear Drum|ear drums]] are too small. | ||
| − | : Large [[animal]]s such as | + | : Large [[animal]]s such as whales and elephants 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]]. | : [[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. | : [[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]]. | : [[Infrasound]] detectors can help locate the source of an [[earthquake]]. | ||
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| + | ===References=== | ||
| + | ====Edexcel==== | ||
| + | |||
| + | :[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Infrasound, page 109, GCSE Physics, CGP, Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Infrasound, page 37, GCSE Physics; The Revision Guide, CGP, Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Infrasound, pages 62-63, GCSE Physics, Pearson Edexcel ''] | ||
Latest revision as of 16:40, 21 November 2019
Contents
Key Stage 4
Meaning
Infrasound is sound below a frequency of 20Hz.
About Infrasound
- Infrasound is any sound which is too low pitched to hear. Since the lowest frequency a human can hear 20Hz, then infrasound is any sound below that.
- Humans cannot hear frequencies below 20Hz because their ear drums are too small.
- Large animals such as whales and elephants can hear infrasound because their ear drums are larger than human ear drums.
- Infrasound detectors can be used to track large animals which communicate using infrasound.
- P-waves are infrasound and a type of seismic wave caused by earthquakes.
- Infrasound detectors can help locate the source of an earthquake.