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Ultrasound - resolution

Sound waves with frequencies from 20-20,000Hz can be heard by humans. If
the sound waves have a frequency about this we cannot hear it. This is called
ultrasound. Ultrasound is used for scanning in hospitals, most commonly for
unborn babies, but also for hearts, abdomen and breasts.…

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depends on what it is being used for. In general the wavelength ranges from
0.075mm to 1.5mm. This means that anything closer together than the
wavelength will be seen as one item. So fingers which are 0.5mm wide in a
foetus will only be seen in an ultrasound where the…

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