In this lesson, students learn about different types ... through the air from the whistle to their ears in the form of sound waves. Explain to them that waves are disturbances that transmit ...

The process is very similar to ultrasound imaging. However, the sound waves used are within normal hearing range, and they are used to identify objects rather than internal structures. This ...

The molecules bump into each other passing the vibrations through the air. This is called a sound wave. If your ears are close to the vibrations then you hear them clearly. The further a sound ...