Ключевые слова: 3d, access, assistance, audio, broadcasting, business, communication, concept, conference, contemporary, device, digital, ear, earth, equipment, global, globe, handsfree, headphone, headset, helper, industry, internet, leisure, listening, media, medium, messaging, music, operator, phone, planet, player, quality, record, service, sound, support, talking, technology, telecommunication, telephone, world,