Ключевые слова: amplification, announce, asian, audience, auditorium, board, boardroom, business, china, communication, company, conference, corporate, cup, discussion, drink, empty, event, group, hall, indoor, inside, leadership, lecture, media, meet, meeting, microphone, modern, news, podium, professional, public, report, room, row, seminar, sitting, speak, speaker, speech, stage, system, table, training, visual, voice,