intercom

1. N-COUNT An intercom is a small box with a microphone that is connected to a loudspeaker in another room. You use it to talk to the people in the other room. 对讲机

I pushed a button on my intercom and told Viktor Ilyushin that I needed to see him. 我按了一下对讲机上的一个按键，告诉维克多·伊留申我要见他。