ven·tril·o·quism /vɛnˈtrɪləˌkwɪzəm/
  腹語;腹語術
  Ven·tril·o·quism n.  The act, art, or practice of speaking in such a manner that the voice appears to come, not from the person speaking, but from some other source, as from a dummy held by the ventriloquist, from the opposite side of the room, from the cellar, etc.
  ◄ ►
  ventriloquism
       n : the art of projecting your voice so that it seems to come
           from another source (as from a ventriloquist's dummy)
           [syn: ventriloquy]