Ключевые слова: audience, audio, auditorium, building, business, closeup, concepts, conference, convention, crowd, defocused, discussion, equipment, event, focus, group, hall, horizontal, ideas, indoors, large, lecture, listening, meeting, microphone, microphone on stage, object, people, performance, presentation, public, seat, selective, seminar, sound, space, speaker, spectator, speech, stage, talk, talking, theater, theatrical,