- A speaker is a device that converts electrical signals into sound waves.
- When a fluctuating electric current flows through the coil, it becomes a temporary electromagnet attracted and repelled by the permanent magnet.
- As the coil moves it also moves the cone back and forth pumping sound waves into the air.
- In order to translate an electrical signal into an audible sound, speaker contain an electromagnet, a metal coil which creates a magnetic field when a electric current flows through it.
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