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\subsection{Background}  The chosen subject, being combining a running application with guiding  sounds, is to our knowledge unusual. This makes the subject academically  interesting, since it is a new area to explore. Computer games make  use of sound to enhance the user experience, but with modern smartphone  sensors the same could be done in an outdoor environment to create  a virtual reality in sound.  There are currently multiple running applications making use of GPS  technology in order to measure speed and distance. Some, like “Zombies,  run!” even tracks the speed and simulates monsters approaching (audio)  if the user’s speed is too slow \citep{SixtoStart2014}. However,  the sound effects aren’t directional, meaning that the direction of  which the sound is not important for the game’s functionality - it  acts more like a cool feature.  By combining sound with the running game concept it would be possible  to hear something, for example a coin, and by running towards it be  able to obtain it when its location is reached. At the same time monsters  could be heard from a specific direction and by running in another  direction they could be avoided. These features will be a great motivator  for people struggling with motivation to workout on a regular basis.  Other academical parts that will not be mainly focused on but still  could be useful to have in mind is the behaviour science of what makes  a game fun and motivating. Therefore the target group of the application  is not only people who run regularly, but also people who need motivation  to do so.  Also it might be useful to investigate some shortest paths algorithms  for the running track.  All of this will be encapsulated in an Android application.