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≪Chapter 1≫What is Ultrasound?
[ULTRASOUND HANDBOOK]

Natural Shape of Ultrasound
What really is ultrasound?

Learning Lessons From Living Things
Some animals use ultrasound effectively.

Emitting Ultrasound
How do we emit ultrasound?

Using Reflection
Sound has a property to reflect.

Using Vibration
The vibration of the air is a sound. Then, when we use the vibration directly, ...
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