What is "sound stage"

n. a soundproof room or building used for the production of movies or of television programmes

In common usage, a sound stage is a soundproof, hangar-like structure, building, or room, used for the production of theatrical film-making and television productions, usually located on a secured movie or television studio property.

A soundstage should not be confused with a silent stage. A soundstage is sound-proofed so that sound can be recorded along with the images. A silent stage is not soundproofed, and is susceptible to outside noise interference, and so sound is not generally recorded. Because most sound in movies, other than dialogue, is added in post-production, this generally means that the main difference between the two is that soundstages are used for dialogue scenes, but silent stages are not.