Ключевые слова: abstract, asian, audience, auditorium, background, blur, blurred, blurry, boardroom, bokeh, business, businessman, center, classroom, college, communication, concept, conference, congress, convention, corporate, crowd, defocused, education, event, group, hall, hotel, interior, knowledge, lecture, light, listening, meeting, office, people, person, presentation, professional, public, room, seminar, speaker, speaking, speech, study, teaching, team, training, university,