Audio refers to sound or the reproduction of sound, especially when recorded, transmitted, or reproduced.
The term "audio" is commonly used in:
1. Audio equipment - devices like speakers, microphones, and headphones
2. Audio files - digital sound recordings (MP3, WAV, etc.)
3. Audio engineering - the technical aspects of sound recording and reproduction
4. Audio frequency - the range of human hearing (20 Hz to 20 kHz)