To see the virtual world, the user needs to have a headset on his head with built-in displays in front of each eye. The headset also includes a motion sensor to detect the position of the head and the direction the user is looking. The computer uses this information to recalculate the image of the virtual world - which is different for each eye - in the direction of the user's gaze and its display in the headset. The computer must generate a new image at least ten times per second so that the image is not jagged and is not delayed from user movements. Virtual world scenes must therefore be simple so that the computer can restore the image quickly.
The user hears through the headphones in the headset. The information from the head position sensor is also used to modulate the surround sound. When the source is not directly opposite the user, the computer changes the sound so that it comes as if from the side. As with image display, sound is still being researched to get a closer look at reality.
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