Ключевые слова: abstract, audience, auditorium, blurred, boardroom, business, busy, class, classroom, college, concept, conference, copy, corporate, crowd, detox, education, group, hall, high, knowledge, large, learning, lecture, listening, meeting, men, note, people, person, presentation, projector, public, room, school, screen, seminar, sit, slide, space, speaker, speaking, teacher, teaching, technology, training, university, watching, women, world, young,