loudspeaker /ˌlaʊdˈspiːkə/ (also loud speaker) CET6+ TEM4

• 1. 

  N-COUNT A loudspeaker is a piece of electronic equipment that forms part of a public address system and transmits sound. 扬声器

  例：

  The loudspeaker announced the arrival of the train.

  广播说火车进站了。

• 2. 

  N-COUNT A loudspeaker is a piece of equipment, for example, part of a radio or hi-fi system, through which sound comes out. 喇叭 [英国英语]