* Electrical Signal: A speaker receives an electrical signal, usually from an amplifier. This signal is a fluctuating current that represents the sound wave being reproduced.
* Electromagnetism: The electrical signal passes through a coil of wire called a voice coil. This coil is placed within a magnetic field.
* Movement: The fluctuating current in the voice coil creates a changing magnetic field. This interacts with the permanent magnet, causing the coil (and a cone attached to it) to move back and forth.
* Sound Waves: The cone's movement pushes and pulls on the air, creating sound waves that we hear.
In summary: The electrical signal, through electromagnetism, causes a physical movement in the speaker, which then creates sound waves.
