What is the device that converts electrical signals to audible sounds called?

• A. Speaker
• B. Microphone
• C. Amplifier
• D. Antenna

Answer: (A)

The device that turns electrical signals into audible sound is a speaker. It acts as a transducer that converts electrical energy into mechanical motion: the electrical audio signal drives a coil in a magnetic field, causing a lightweight diaphragm or cone to move back and forth. That motion pushes and pulls on the surrounding air, creating sound waves that you can hear. This is distinct from a microphone, which turns sound into electrical signals; an amplifier, which increases the signal’s power but doesn’t produce sound by itself; and an antenna, which radiates radio waves from electrical signals. So the speaker is the component that makes audible sound from an electrical audio signal.