The loudspeaker on an intercom or public address system
English: squawk box, squawker, intercom speaker
squawkerEnglish
squawker, bellyacher, complainer, crybaby, grumbler
Noun
A person given to excessive complaints and crying and whining
English: whiner, complainer, moaner, sniveller, crybaby, bellyacher, grumbler, squawker