The quality of our sleep can affect our hearing; and our hearing can affect the quality of our sleep. There are three main factors that influence quality of sleep. 

The first is DURATION. We need to have enough sleep so that we are rested and alert the next day. We also need CONTINUITY in our sleep, which means good periods of sleep where we aren’t waking up or being woken up.  Finally, DEPTH: we need sleep that is deep enough to be restorative.