n. electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
n. 扩音器, 喇叭
[电] 扬声器
1. The loudspeaker announced the start of the concert.
扩音器宣布音乐会开始了。
2. She used a loudspeaker to give instructions to the crowd.
她使用扩音器向人群发出指示。
3. The loudspeaker was too loud, and it hurt my ears.
扩音器声音太大，弄得我耳朵很痛。