Ключевые слова: announcement, audience, audio, auditorium, background, blurred, business, center, chair, communication, conference, convention, design, education, entertainment, equipment, event, focus, group, hall, indoor, interior, lecture, lecturer, light, media, meeting, mic, microphone, modern, performance, podium, presentation, professional, public, room, seat, selective, seminar, show, sound, speak, speaker, speech, stage, stand, study, table, talk, voice,