Ключевые слова: adult, audience, audio, auditorium, background, blurred, boardroom, business, center, communication, concert, conference, congress, convention, corporate, dais, education, entertainment, equipment, event, group, hall, karaoke, learn, lecture, light, manager, meeting, mic, microphone, modern, music, performance, person, podium, presentation, professional, public, room, seminar, show, sound, speaker, speaking, speech, stage, technology, university, voice, workshop,