The Importance of Door Knockers

In old Tehran houses would have two door knockers one was square and heavier and the other was more rounded can you guess why? The woman of the house might not answer the door to yeah that's really kind of cultural reasons they might also have read this. They might disguise their voice behind the door to ask the business of who's coming around oh is that like saying oh I've got some big men here I'm gonna beat you up if you come in do that's what I say just in case they might be coming into attackYeah there's good to let people know so it wouldn't be too loud to upset the people of the house don't knock it on your houseyeah you muff