Ключевые слова: audience, audio, auditorium, background, black, blur, business, church, commemorate, communication, conference, congress, convention, corporate, death, education, equipment, event, funeral, group, hall, lecture, light, loss, media, meeting, mic, microphone, modern, mourning, people, podium, presentation, public, room, sadness, seminar, sound, speaker, speech, stage, wearing,