ultrasound

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what is the minimum frequency of an ultrasound wave?
20hz
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what is the maximum frequency for ultrasound???
20,000 hz
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why is ultrasound safer than an x-ray?
because it is non ionising
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when is a sound classed as ultrasound?
when it is above 20,000 hz
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what is ultrasound best at scanning?
soft tissues
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what are x-rays good for scanning?
they are good for scanning hard tissues such as bones and teeth
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Card 2

Front

what is the maximum frequency for ultrasound???

Back

20,000 hz

Card 3

Front

why is ultrasound safer than an x-ray?

Back

Preview of the front of card 3

Card 4

Front

when is a sound classed as ultrasound?

Back

Preview of the front of card 4

Card 5

Front

what is ultrasound best at scanning?

Back

Preview of the front of card 5
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