Virtual reality
VR is most commonly used in entertainment applications such as gaming and 3D cinema. Consumer virtual reality headsets were first released by video game companies in the early-mid 1990s. Beginning in the 2010s, next-generation commercial tethered headsets were released by Oculus (Rift), HTC (Vive) and Sony (PlayStation VR), setting off a new wave of application development. 3D cinema has been used for sporting events, pornography, fine art, music videos and short films. Since 2015, roller coasters and theme parks have incorporated virtual reality to match visual effects with haptic feedback .
History of hearing aids
The creation of high-speed digital-array processors used in minicomputers opened up the door for advances in digital hearing aids. These minicomputers were able to process audio signals at speeds that were equivalent to real-time. In 1982, at the City University of New York, the first real-time all digital hearing aid was created. The equipment contained a digital array processor and minicomputer. This consisted of an FM radio transmitter and receiver. The radio made a connection between the individual through a transmitter on the body to the radio on top of the computer. The transmitter on the body was connected by a wire to the ear microphone and the receiver. Even though this was a major breakthrough in the creation of hearing aids, there were still a few problems. One of these major problems was that while the hearing aid worked, it was extremely heavy and nearly impossible to move.
The first commercial digital hearing aid was created in 1987 by the Nicolet Corporation. The hearing aid contained a body-worn processor that had a hardwire connection with an ear mounted transducer. While the Nicolet Corporation’s hearing aid was not publicly successful and the company shortly folded, it was able to start a competition between companies to create more effective hearing aids. Two years later, in 1989, the behind-the-ear (BTE) digital hearing aid was launched.