Ключевые слова: advertisement, advertising, alert, announce, announcement, attention, audio, background, broadcast, broadcasting, bullhorn, call, cartoon, communicate, communication, concept, design, electric, element, graphic, icon, illustration, information, isolated, loud, loudspeaker, marketing, media, mega, megaphone, message, object, power, promotion, protest, public, red, render, rupor, shout, shouting, sign, single, sound, speak, speaker, speech, symbol, voice, volume,