What is Sound?

Sound is the vibration of air molecules. When a vibrating structure such as the vocal cords, a loudspeaker or a musical instrument comes into contact with the air molecules around it, it causes those molecules to vibrate….

This video from the Children’s Museum of Virginia is a nice, simple introduction to sound and hearing

In the first part of this video this young lad does a great job explaining sound in a song he has written. Very clever: