Technology
How does a microphone work?
A microphone works by turning sound into an electrical signal. Sound waves push on a thin diaphragm, and its tiny movements are converted into a matching electric current that devices can record, amplify, or transmit.
See it in motion.
Watch a 2-minute animated lesson that shows exactly how a microphone works.
Step by step
- 1Sound waves vibrate a thin diaphragm inside the mic.
- 2Those vibrations are converted into a matching electrical signal.
- 3Different designs use magnets, capacitors, or crystals to do this.
- 4The signal can then be recorded, amplified, or sent over a network.
Frequently asked questions
- How does a microphone turn sound into a signal?
- Sound vibrates a diaphragm, and that motion is converted into a matching electrical current.
- What are the main types of microphones?
- Common types include dynamic (magnet and coil) and condenser (charged plates) microphones.
- How do voice assistants use microphones?
- Mics capture your speech as a signal, which AI then converts to text and interprets.