deletions | additions       diff --git a/Background.tex b/Background.tex  index 12a174f..3695e52 100644  --- a/Background.tex  +++ b/Background.tex 
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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 are not  directional, meaning that the direction of which the sound is not important for the game’s functionality - it  acts more like a cool feature.