Ключевые слова: abstract, adult, audience, audio, auditorium, blur, blurred, business, center, communication, concept, concert, conference, congress, convention, corporate, design, education, entertainment, equipment, event, group, hall, lecture, light, media, meeting, mic, microphone, modern, music, people, person, podium, presentation, professional, public, room, seminar, sound, space, speaker, speaking, speech, stage, stand, study, table, technology,