Ключевые слова: address, announce, announcement, black, blue, bluesky, broadcast, calling, clouds, commentate, communicate, communication, hailer, idea, information, loud, loudspeaker, loudspeakers, masts, megaphone, message, music, noise, open, outdoor, posts, public, relay, shout, showgrounds, sky, sound, soundsystem, speaker, speakers, sports, spread, stadium, system, trumpets, voice, white,