A device that converts electric signals to audible sound.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "loudspeaker" in a sentence
"The loudspeaker is replaced by a microphone, which picks up sound."
"At present the loudspeaker is the enemy of the creative writer, but this may not necessarily remain true when the volume and scope of broadcasting increase."
"Suddenly, the entire campsite, the whole upper surface of the plateau was bathed in powerful white light, and there was a voice, in labored English, coming over some kind of loudspeaker from the air above them."