How speakers work
1. Electrical signals pass through wires in the form of analog, sinusoidal (or other) waves
2. The signal enters the voice coil, which wraps around the inner magnet (in the form of a solenoid)
3. A force is applied from the stable magnet structure to the freely moving voice coil
4. The force on the voice coil fluctuates back and forth as the signal amplitude and frequency change
5. The voice coil vibrates rapidly along the axis of the magnet structure, causing the cone to vibrate
6. As the cone vibrates, the air around it is pressurized and diluted.
7. Pressurized air molecules travel as waves – this is sound
