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Waves

Sound - Ultrasound.

Sound with a frequency higher than 20,000 Hz is called ultrasound.

Ultrasound echoes are used in

Scanning and Range and Direction Finding.

Ultrasound in liquids can be used to clean precious or delicate items
because the compressions and rarefactions
will shake dirt and unwanted material free
without the risk of damage being caused by handling the item.

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Copyright © 2007 Dr. Colin France. All Rights Reserved.