Ключевые слова: alert, alertness, announcement, attention, background, broadcast, communicate, communicating, communication, concept, direction, equipment, expression, hand, hold, idea, influence, information, leadership, loudspeaker, megaphone, message, news, noise, opinion, power, protest, public, scream, shout, shouting, signal, sound, speak, speaker, speech, talk, teal, voice, warning, white,