Meanings of hear the loudspeaker in English

He didn't hear the loudspeaker blaring until the announcer had stumbled over his name half a dozen times.

Can you hear the loudspeaker?

"You haven't heard the loudspeakers they've got," said Hagbard.

Off in the distance, above the throbbing surf, they could hear the loudspeakers from the outdoor movie-Mexicanvoices, a woman weeping, background music.