Ключевые слова: alarm, alert, amp, amplification, amplifier, announce, announcement, antenna, audio, background, black, blue, broadcast, broadcasting, bunch, clouds, communication, dirty, electric, equipment, high, information, loud, loudspeaker, many, megaphone, metal, news, old, outdoor, pillar, pole, power, public, siren, sky, sound, speak, speaker, station, system, talk, technology, tell, tower, vintage, voice, volume, warning, wire,