Ключевые слова: abstract, audience, audio, auditorium, blur, bokeh, business, center, classic, closeup, communication, concert, education, empty, entertainment, equipment, event, focus, hall, indoor, karaoke, lecture, lecturer, light, meeting, mic, microphone, mike, modern, music, musical, podium, presentation, professional, public, radio, room, seminar, sing, song, sound, speak, speaker, speech, stage, stand, talk, teach, voice,