Ключевые слова: academic, anonymous, attention, audience, auditorium, back view, blur, business, businesspeople, chair, communicate, community, company, conference, contemporary, convent, crowd, discuss, education, entrepreneur, event, faceless, gather, group, hall, horizontal, indoors, lecture, listen, manager, many, meeting, modern, participant, participate, presentation, professional, public, seat, seminar, share, sit, speaker, together, unrecognizable,