loudspeaker

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

The loudspeaker announced the arrival of the train. 廣播說火車進站了。

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[英國英語]