tetzaveh

The Posuk says that the מעיל had pomegranate shapes & gold bells all around it.
The Gemara says that רב ענני בר ששון says the reason the Parsha of the בגדי כהונה is next to the Parsha of the קרבנות is to teach us just like the קרבנות were מכפר so too the בגדי כהונה were מכפר on certain sins.
The מעיל was מכפר on Lashon Hara, for let something that makes noise be מכפר on the noise of Lashon Hara.
Rav Dimi says that one shouldn't even speak good of his friend for once your talking about someone you'll end up saying bad too.
Rav Yehushua ben Levi says that one of the things that we don't find any Kapara for in the קרבנות is Lashon Hara, but it has a Kapara someware else, namely the Ketores. For let something that's done in private atone for a sin that's done in private.
So which is it? Is the Ketores מכפר on Lashon Hara or is the מעיל? Why do we need both?
The Gemara answers that the מעיל is מכפר on Lashon Hara that was said in public & the Ketores is מכפר on Lashon Hara that was said in private, for let something that's brought in private be מכפר on a sin that's done in private.
Why do we need 2 different Kaparos for the same sin? What's the difference where its done?
The Medrash says that we learn from the noise the bells make that one shouldn't walk into someone's house without announcing himself in some way, such as knocking .
Why is it so bad to walk into someone's house suddenly, that as the Medrash says, a person is considered hated by Hashem if he does so?
Also on the מעיל are the pomegranates that don't make any noise, so what are those for?
Rav Dovid Feinstein says the reason we need the Ketores to be מכפר is because the Ketores is alluding to even speaking nicely about someone, for the ketores smells nice, alluding to talking nicely but then something bad is bound to come out. So it's better not to say anything at all about people.
Maybe that's why we need both, the Torah is telling us let's focus on the מעיל which has the pomegranates, as the Chafetz Chaim says teach us that when it comes to talking about people it's better to be silent like the pomegranates.
That could also be what's so bad about barging in on people, for the only reason someone would come into a house unannounced is to find some gossip that he could go spread to other people. So the מעיל is saying, look at the bells & knock, then look at the pomegranates & keep your mouth shut. In this way we'll have all the Brochos of wealth & prosperity that the Ketores brings.