loud speaker

基本解释

TruthSeek3r and if they announce in loud speaker whats really going on, what can you do?
即使他们大声告诉你发生了什么事，你又能做什么？
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At the L metro station in northern Paris, a loud speaker informs commuters trains were functioning sporadically, rather than not at all as it had as a few days before.
巴黎北部的L地铁站，一位工作人员正在大声的通知乘客，地铁和铁路正在少量运营，而非如几天前那样彻底不工作。
Taking over the loud speaker from Queen, I realised that my mind was a blank at the unearthly hour.
我用大喇叭跟大家喊完话之后，我发现我的脑袋在这不真实的一刻一片空白。

It's certainly effective, though, the surprisingly loud speaker has us crossing our fingers for a mute button in the final version.
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As before with the Mono-series, you can run them on batteries and there's a loud speaker to annoy impress your friends with.
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These incidents have done more than the decades of screeching by Japanese militarists with their loud-speaker vans to nudge the country into taking tougher measures to defend itself.
ECONOMIST: Japan

A loudspeaker is a piece of electronic equipment that forms part of a public address system and transmits sound.
A loudspeaker is a piece of equipment, for example, part of a radio or hi-fi system, through which sound comes out.

扬声器
A loud speaker is a device which can convert electrical signal to voice signal and whose trend of development will be a smaller size and a better timbre.
扬声器是一种把电信号转换成声音信号的电声器件,正朝着尺寸小、音质好的方向发展。
电子、通信与自动控制技术
扬声器