GREG FOOT: Hello I'm Greg Foot. FRAN SCOTT: And I'm Fran Scott. And this is the House Of Sound. FRAN: Well pin back your ears as you're about to find out with this little film I made. So Greg is ...

When you bang a drum the skin vibrates. The vibration of the drummakes the air particles inside and around the drum vibrate too and this forms sound waves. The sound waves travel outin all ...