Omnidirectional refers to a type of microphone or audio device that captures sound equally from all directions. Unlike directional microphones, which pick up sound primarily from a specific direction (such as cardioid, supercardioid, or shotgun microphones), omnidirectional microphones are designed to be sensitive to sound from all angles.

This makes them ideal for situations where capturing a natural, ambient sound is important, such as in roundtable discussions, ambient sound recording, or live performance environments where the source of the sound is moving or not fixed in one place. Omnidirectional microphones are valued for their ability to produce a more natural and open sound quality.