Ключевые слова: abstract, audio, background, board, business, chair, closeup, commentator, communication, communications, concept, conference, entertainment, equipment, event, horizontal, indoors, lecture, media, meeting, meeting room, mic, microphone, microphones, multimedia, object, press, professional, room, seminar, show, sound, sound engineer, speak, speaker, speech, stage, table, technology, video conference, vocal, voice, wireless,