Ключевые слова: abstract, audio, background, 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, notebook, object, office, pen, power amplifier, press, professional, room, seminar, show, sound, sound mixer, sound waves, speak, speaker, speech, stage, table, technology, video conference, voice, work,