Ключевые слова: abstract, audience, background, blur, blurred, blurry, boardroom, bokeh, business, businessman, center, classroom, concept, conference, convention, corporate, crowd, decoration, defocused, education, equipment, event, exhibition, function, group, hall, lecture, light, listening, market, meeting, motivation, multimedia, participants, party, people, person, presentation, press, professional, projector, room, screen, seminar, sit, speaker, speech, store, study, table,