Ключевые слова: advertisement, advertising, alert, announce, announcement, attention, audio, background, broadcast, broadcasting, bullhorn, business, campaign, communicate, communication, concept, design, element, equipment, graphic, horn, icon, illustration, internet, isolated, logo, marketing, media, megaphone, message, noise, object, professional, promotion, propaganda, public, scream, shout, sign, simple, sound, speak, speaker, speech, symbol, voice, volume, warning, web,