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: Cleaning - [[Ultrasound]] can be used to clean dirt from surfaces. The [[vibration]]s can create small bubbles in a [[water]] which work their way into cracks push the dirt out.
: Physiotherapy - The [[vibration]] from [[ultrasound]] can be used to massage parts of the body which can stimulate healing and repair.
==Key Stage 4==
===Meaning===
[[Ultrasound]] is [[sound]] that has a [[frequency]] higher than 20,000[[Hz]].
===About Ultrasound===
: [[Ultrasound]] is any [[sound]] which is too high [[pitch]]ed to [[hear]]. Since the lowest [[frequency]] a [[human]] can hear 20,000Hz, then [[ultrasound]] is any [[sound]] above that.
===Applications===
====[[Ultrasound Imaging]]====
: [[Ultrasound]] can be [[reflect]]ed, [[refracted]] or [[Absorb (Physics)|absorbed]] at the [[interface]] between different [[media]]. This can be used, along with a computer, to create images of the internal structure of an [[object]]. This is particularly useful for [[opaque]] [[object]].
: [[Ultrasound]] is generally used to detect cracks in large [[metal]] structures.
: [[Ultrasound]] is used in hospitals to create images of [[organ]]s and of the [[foetus]] of [[pregnant]] [[female]]s.
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac469 ''Ultrasound, page 89, 90, GCSE Physics; The Revision Guide, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Ultrasound, pages 190, 199, 208-9, GCSE Physics; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Ultrasound, pages 191-2, GCSE Physics, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Ultrasound, pages 282, 283, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
====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 ''Ultrasound, page 36, GCSE Physics; The Revision Guide, CGP, 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 ''Ultrasound, pages 106-108, GCSE Physics, 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 ''Ultrasound, pages 60-61, GCSE Physics, Pearson Edexcel '']
====OCR====
:[https://www.amazon.co.uk/gp/product/1782945687/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945687&linkCode=as2&tag=nrjc-21&linkId=9a598e52189317a20311d7a632747bc9 ''Ultrasound, page 65, Gateway GCSE Physics; The Revision Guide, CGP, OCR '']
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Ultrasound, pages 48, 147, Gateway GCSE Physics, Oxford, OCR '']