Ключевые слова: audience, auditorium, back, background, blur, business, classroom, communication, computer, conference, convention, corporate, crowd, education, entertainment, event, group, hall, information, internet, laptop, lecture, light, meeting, movie, notebook, participants, people, performance, play, presentation, public, room, row, scene, screen, seat, seminar, show, sitting, smartphone, speaker, spectator, speech, theater, theatre, theatrical, training, watching,