Ключевые слова: advertisment, amplifier, announce, announcement, attention, audio, blue, broadcast, bullhorn, command, communication, concept, conceptual, control, device, director, electric, electronic, event, funnel, guide, horn, loud, loudspeaker, megaphone, message, metaphor, object, police, power, powerful, protest, public, regard, retro, sky, speaker, speakingtrumpet, speech, system, tour, trumpet, vertical, vintage, voice, volume, warning, wires, yell,