Ключевые слова: abstract, audio, background, board, business, chair, closeup, communication, communications, concept, conference, convention, down lighting, education, entertainment, equalizer, equipment, event, horizontal, indoors, lecture, media, meeting, meeting room, mic, microphone, microphones, modern, object, power amplifier, press, professional, room, seminar, show, sound, sound engineer, sound mixer, sound waves, speak, speaker, speech, stage, table, technology, up, video conference, voice, work,