Have you seen a show by Ventriloquism?

In local TV shows, there are specialists (Ventriloquists) appear with a doll in their hand. I just do not know how they make the doll to talk.

Your uestion should have been either 'Have you seen a show by Ventriloquist?' or 'Have you seen a show of Ventriloquism?'.Ventriloquism is an art and Ventriloquist is the artist performing ventriloquism. I am a Ventriloquist and I have performed more than one thouysand shows. The art of manupulating and throwing your voice in such a way that an illusion is created as if the voice is coming from some other place.This is done by our natuarl voice box only but the way is unnatural.Ventriloquist has a fantastic lip control, which makes the show really mysterious. A proper Dummy and the proficiency of the Ventriloquist to manipulate and match the dialogues leaves audience who don't know what ventriloquism is, in utter confusion and astonishment!InIndia we have very few Ventriloquists and the awareness about this art is almost as good as nil. I must have come accross hundreds of welleducated and qualified persons who were wonderstruck and were not in a position to make out what was going on and how an inanimate Doll could talk like a human being!I love to stage my shows, because of my busy schedule and professional demands now a days I am not doing frequent shows, still if I get time I am doing some shows for Charity purpose!