Presence (sound recording)
（重定向自Room Tone）
In filmmaking and television production presence (or room tone) is the "silence" recorded at a location or space when no dialogue is spoken. This term is often confused with ambience.
Every location has a distinct presence created by the position of the microphone in relation to the space boundaries. A microphone placed in two different locations of the same room will produce two different presences. This is because of the unique spatial relationship between the microphone and boundaries such as walls, ceiling, floor and other objects in the room.