Ventriloquism

Ventriloquism is a form of stage theater in which a person changes his or her voice so that it sounds like the voice is coming from somewhere else (usually a puppet or a dummy). A ventriloquist is one who performs this art.
Origins.
Originally, it was practiced in religion. Now, it is used in comedy.
History of modern-day ventriloquism.
Today's modern ventriloquism started in nightclubs.