Ventriloquism is an ancient art of projecting one's voice to make it appear as if it is coming from elsewhere, often using a puppet or doll. Some key techniques ventriloquists use include substituting or avoiding certain sounds that require lip movement, keeping the mouth still, and distracting the audience. Many famous ventriloquists throughout history have used dummies like Charlie McCarthy or Lamb Chop to entertain. Ventriloquism has also been featured in many films and television shows.