Ключевые слова: audience, audio, auditorium, background, black, blur, boardroom, broadcast, business, classroom, closeup, color, communication, concept, concert, conference, convention, copy, education, entertainment, equipment, event, events, focus, group, hall, horizontal, lecture, media, meeting, metal, mic, microphone, music, musical, people, performance, public, radio, room, selective, seminar, soft, sound, space, speech, stage, studio, technology, voice,