abstract

advertising

alert

animated

animation

announce

announcement

background

broadcast

bullhorn

communication

concept

control

design

equipment

graphic

green

hailer

icon

illustration

isolated

line

linear

looped

loud

loudspeaker

media

megaphone

message

motion

news

object

promotion

propaganda

public

reproducer

scream

screen

shout

sign

simple

sound

speaker

speech

symbol

vector

video

voice

white