noun
ventriloquism; throwing one's voice
The art of speaking without moving the lips, making it appear that a puppet or other object is talking.
彼は腹話術で人形をしゃべらせるのが得意だ。
He is good at making a puppet talk using ventriloquism.
腹話術の練習を始
Since I started practicing ventriloquism, I've found it difficult to control my mouth movements.