Ventriloquism

Ventriloquism, or ventriloquy, is an act of stagecraft in which a person (a ventriloquist) creates the illusion that their voice is coming from elsewhere, usually a puppeteered prop, known as a "dummy". The act of ventriloquism is ventriloquizing, and the ability to do so is commonly called in English the ability to "throw" one's voice.

Ventriloquist The Great Lester with Frank Byron, Jr. on his knee, c. 1904