advertise
amplifier
announce
announcement
audio
background
blue
broadcast
bullhorn
communication
concept
conceptual
declare
director
electric
enunciate
event
girl
herald
horn
loud
loudspeaker
megaphone
message
metaphor
news
object
police
powerful
proclaim
protest
public
publish
relations
retro
sky
speaker
speech
spread news
state
system
trumpet
vintage
voice
warning
white
yell