Ключевые слова: abstract, adult, audience, background, blur, blurred, blurry, board, boardroom, bokeh, business, center, classroom, communication, concept, conference, convention, corporate, crowd, defocused, education, empty, event, exhibition, focus, group, hall, hotel, international, lecture, light, listening, meeting, microphone, multimedia, party, people, person, presentation, press, professional, public, room, seminar, sit, speaker, speech, student, training, university,