Ключевые слова: 3d, advertisement, alert, amplifier, announce, announcement, attention, audio, background, broadcast, broadcasting, bullhorn, business, communication, concept, copy space, emergency, grey, horn, icon, illustration, information, isolated, leadership, loud, loudspeaker, marketing, megaphone, message, news, noise, object, propaganda, public, red, render, scream, shout, shouting, sound, speak, speaker, speech, symbol, talk, threedimensional, voice, volume, warning, white,