Ключевые слова: abstract, adult, audience, auditorium, background, blur, blurred, blurry, boardroom, business, college, communication, concept, conference, congress, convention, copy, corporate, crowd, decoration, defocused, education, equipment, event, focus, group, hall, international, knowledge, large, learn, lecture, light, media, meeting, modern, people, person, podium, presentation, public, room, screen, seminar, sit, speaker, speaking, teaching, university, young,