Ключевые слова: abstract, announcement, audience, audio, background, black, blur, bokeh, broadcast, comedy, communication, concert, conference, dof, electronic, entertainment, equipment, event, hall, karaoke, lecture, light, lights, media, meeting, mic, microphone, music, performance, photo, presentation, room, seminar, sound, speaker, speech, stage, stand, studio, talk, technology, telecommunication,