Ключевые слова: address, alarm, alert, amp, amplification, amplifier, announce, announcement, audio, blue, broadcast, calling, clouds, column, communication, dirty, electric, electronic, equipment, information, loud, loudspeaker, many, megaphone, message, new, old, outdoor, pair, pillar, pole, post, power, public, rusty, shout, sky, sound, speak, speaker, sports, station, system, talk, vintage, voice, volume, warning, white, wire,