voice over recording microphone voice over for television, radio commericials, advertisiments, and spots
A Creative Device
In film, the film-maker places the sound of a human voice (or voices) over images shown on the screen that may or may not be related to the images being shown. Consequently, voice-overs are sometimes used to create ironic counterpoint. Also, sometimes they can be random voices not directly connected to the people seen on the screen. In works of fiction, the voice-over is often by a character reflecting back on his or her past, or by a person external to the story who usually has a more complete knowledge of the events in the film than the other characters.

Voice-overs are often used to create the effect of storytelling by a character/omniscient narrator. For example, in The Usual Suspects, the character of Roger "Verbal" Kint has voice-over segments as he is recounting details of a crime. Other examples of storytelling voice-overs can be heard in Gattaca, Blade Runner, The Shawshank Redemption, Big Fish, Moulin Rouge!, and Goodfellas.

Sometimes, voice-over can be used to aid continuity in edited versions of films, in order for the audience to gain a better understanding of what has gone on between scenes. This was done when the 1948 Joan of Arc, starring Ingrid Bergman, turned out to be far from the box-office and critical hit that was expected, and was edited down from 145 minutes to 100 minutes for its second run in theatres. The edited version, which circulated for years, used narration to conceal the fact that large chunks of the film had been cut. In the full-length version, restored in 1998 and released on DVD in 2004, the voice-over narration is heard only at the beginning of the film.

The genre of film noir is especially associated with the voice-over technique.

In radio, voice-overs are an integral part of the success of the radio programme. Although the announcer holds the prestige and claims all the glory, it is the voice-over artist that is the real drive behind the show. One example is David M. Green's Summer Pow-Wow [1] and his voice-over artist, Tim Wray.