Lesson 1
If you want someone who is making a lot of noise to be quiet or to listen to what you have to say, word your request in a polite manner. The expression "Shut Up" is demeaning and usually onaas dvorim (verbal abuse).

Lesson 2
When telling someone to be quiet instead of,  "you are a blabber-mouth, you talk and talk and don’t let anyone say anything. Whats wrong with you" or "will you shut up already", try positive approaches that show respect and give the person incentive to listen to what you have to say e.g. "I need to concentrate right now, I would greatly appreciate if you could dbe quiet" or "I’d like to express my opinion, let me have a chance, then i can continue hearing what you have to say".