Ключевые слова: advertising, amplifier, announcement, attention, background, bullhorn, color, communication, copy, device, electric, equipment, green, horn, information, loud, loudhailer, loudspeaker, media, megaphone, message, news, noise, object, portable, proclaim, promotion, propaganda, protest, public, shout, sound, space, speak, speaker, speech, talk, text, top, trumpet, view, voice, volume, warning,