loa phóng thanh 
loudspeaker [ loa ] : megaphone
[ phóng ] : (1) to enlarge; (2) to release, throw, launch, let fly, fling, fire
[ thanh ] : sound, noise, tone, pitch
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
hệ thống loa phóng thanh public address system