When you are awake, the sound produces<span> some </span>kind of<span> reflex, </span>and therefore the part of<span> your brain that processes the sound kicks in and pulls </span>recollections to see<span> what the sound is. Additionally, </span>you have got<span> a voluntary reaction. O</span>nce<span> your sleeping, </span>there'll<span> still be a reflex, </span>however, there's<span> no </span>process<span> and </span>decision making<span>, </span>thus you'll<span> hear it </span>however<span> not be </span>able to<span> distinguish what </span>it is<span>.</span>
<span>While you sleep, your brain processes sounds on a basic level, sometimes causing you to wake or jostle. The impact of sound depends on the stage of sleep you are in.</span>
