loudspeaker

Compared meaning: a device that produces sound (noun).

比较义项：发声装置、扬声器（名词）。

• speaker

  The general, everyday word for any sound-producing device, like a phone, computer or stereo speaker; it carries no sense of loudness or reaching a crowd.

  泛指任何发声设备的日常用词，比如手机、电脑或音响的扬声器；不含“声音大”或“面向一大群人”的意味。

  She connected her phone to the speaker to play music in the kitchen.

  她把手机连接到扬声器，在厨房里放音乐。

• loudspeaker 本词

  Stresses amplifying sound so it carries over distance or noise, typically for public address, outdoor announcements or shouting instructions to a group.

  强调把声音放大，使其能传得更远或盖过噪音，多用于公共广播、户外通知或向一群人喊话。

  An announcer's voice boomed from the loudspeaker across the packed stadium.

  广播员的声音透过扩音器响彻整个座无虚席的体育场。

Speaker is the general word for any device that produces sound, like a phone, computer, or stereo speaker. Loudspeaker stresses making sound louder so it carries over distance, typically for announcements or shouting to a group. Not covered: speaker meaning a person giving a speech.

这两个词在“发声装置”这一义项上意思相近，但使用场合不同：speaker 是日常泛称，指任何播放声音的设备；loudspeaker 强调把声音放大以便传得更远、让更多人听到，多用于室外广播、通知等场合。这里不比较 speaker 的“发言人，演讲者”这一义项。