Ключевые слова: advertisement, alert, announce, announcement, attention, audio, background, banner, broadcasting, business, color, communicate, communication, device, employee, equipment, feedback, hand, hiring, holding, inform, job, loud, loudspeaker, marketing, media, megaphone, message, modern, news, noise, portable, promotion, propaganda, protest, scream, search, shout, shouting, sign, sound, speak, speaker, speech, staff, text, voice, volume, work, yellow,