Virtual reality
Around the same time, Douglas Engelbart used computer screens both as input and output devices. In 1968, Ivan Sutherland, with the help of many students including Bob Sproull, created what was widely considered to be the first head-mounted display (HMD) system for use in immersive simulation applications. It was primitive both in terms of user interface and realism, and the HMD to be worn by the user was so heavy that it had to be suspended from the ceiling. The graphics comprising the virtual environment were simple wire-frame model rooms. The formidable appearance of the device inspired its name, The Sword of Damocles.
Jabra (headset)
Jabra has been responsible for several world firsts. These include the world’s first ultra noise-canceling microphone, the world’s first Bluetooth headset, the world’s first professional active noise cancelation headphones certified for all leading Unified Communication platforms, and the world’s first wireless Dolby sports earbuds with integrated heart rate monitor. Jabra also developed the world’s first in-ear integrated microphone and speaker and DSP-based echo and noise cancelation technologies, and invented and patented EarGels™.