The loudspeaker was saying: "Minus two minutes, one fifty nine, fifty eight, fifty seven—"
The Answer|Henry Beam Piper
I only wish we could get that loudspeaker to speak just a bit louder, said Herb.
The Radio Boys at Mountain Pass|Allen Chapman
It seemed to Terry that the loudspeaker struggled to emit the shrillest imaginable sounds in strict synchrony with the tappings.
Creatures of the Abyss|Murray Leinster
The loudspeaker said no more, but after a moment the gate stirred and lifted into the ceiling.
Rebels of the Red Planet|Charles Louis Fontenay
A few moments later the resonant voice of the loudspeaker was booming across the camp.
The Unprotected Species|Melvin Sturgis
British Dictionary definitions for loudspeaker
loudspeaker
/ (ˌlaʊdˈspiːkə) /
noun
a device for converting audio-frequency signals into the equivalent sound waves by means of a vibrating conical diaphragmSometimes shortened to: speaker Also called: reproducer