Ключевые слова: amplifier, announce, announcer, audio, background, background megaphone, blue, broadcast, calling, city, cloudy, communication, danger, electric, electricity, equipment, high, industry, information, isolated, lamp, lantern, loud, loudspeaker, many, megaphone, metal, old, outdoor, pair, pillar, pole, power, public, shout, signal waves, sky, speaker, station, steel, street, system, technology, tell, tower, urban, volume, warning, white, wire,