Does talking distract learning?

Talking distracts learning because when you are in a classroom for a long time just sitting trying to stay awake, you can get distracted because after a while, anything can move your attention somewhere else.  Those distractions cause a loss in time because the teacher of the class has to stop what he or she is attempting to teach because he or she wants total attention on them.  Once the distraction occurs, the students may lose track of the lesson because they get sidetracked and forget what the teacher was talking about.  The persons who are causing the distraction get nothing out of the lesson because they are distracting themselves with a conversation that does not consist of anything that the teacher is talking about.  Talking does distract learning because it draws attention away from what the students should be learning.