loudspeaker paging

例句：

1. 1. The loudspeaker was playing music in the background.
   扬声器在播放背景音乐。
2. 2. The loudspeaker was used to broadcast news over the radio.
   扬声器被用来通过收音机广播新闻。
3. 3. The loudspeaker was damaged during the storm.
   扬声器在暴风雨中受损了。