Ventriloquism is changing the voice.
It sounds like the voice is coming from somewhere else.
The Person who performs this is called:
Words with the same meaning
Throwing your voice
Ventriloquism looks like someone else is speaking.
Usually a vetriloquist work with a doll.
The vetriloquist speaks without moving his mouth.
So everyone thinks the doll speaks.
The ventriloquist uses to speak (without move his mouth):
Ventriloquism is a profession.