Ключевые слова: address, alarm, alert, amplification, announce, announcement, audio, broadcast, broadcasting, calling, cloud, clouds, column, commentate, communication, communications, electric, emit, equipment, ideas, information, listening, loudspeaker, mast, masts, megafon, megaphone, message, old, open, outdoor, public, shout, sky, sound, soundsystem, speaker, sports, station, system, technology, trumpets, voice, warning,