Ключевые слова: abstract, audience, background, blur, blurred, blurry, boardroom, bokeh, business, classroom, communication, concept, conference, convention, corporate, defocused, design, education, event, explaining, focus, group, hall, hotel, interior, lecture, light, listening, meeting, modern, multimedia, people, person, podium, presentation, professional, public, room, screen, seminar, show, sit, speaker, speech, stage, study, teacher, team, training, workshop,