Ключевые слова: audience, audio, auditorium, background, blur, broadcast, business, communication, concept, concert, conference, congress, convention, education, entertainment, equipment, event, hall, karaoke, keynote, lecture, light, live, meeting, mic, microphone, musical, people, performance, presentation, professional, public, radio, record, room, seminar, show, sing, sound, space, speak, speaker, speech, stage, stand, studio, talk, technology, voice, workshop,