扩音器
近义词与同义词
按词义分组列出，使用时请结合具体语境。
electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
a portable loudspeaker with built-in microphone and amplifier
device for converting sound waves into electrical energy
基本解释
1.亦称"扩声器"。
2.用来扩大音量的器具。亦以喻受人主使而发言的傀儡。