loudspeaker

An announcement about the flight delay was made over the airport loudspeaker.

(Chinese) 机场广播里播报了关于航班延误的通知。

The rock band connected their electric guitars to a massive loudspeaker for the concert.

(Chinese) 摇滚乐队为音乐会将他们的电吉他连接到了一个巨大的扬声器上。