MLV for condo

[ozznet]

I resently bought a new 2 story 2nd floor condo that was built from an existing building and am having problems with sound coming through the carpeted concrete floor as well as structure borne noise. The structure borne noise seems to be coming from doors closing and anything that attached to the wall that is banged.  I was told it had an STC of 62 which is why I bought it but I am seriously doubting that now after my new neighbor moved in. I can hear a lot through the party wall which is two separate frames(so I'm told). The sound of him peeing and other noise travels through the floor and I can hear it my bedroom which is 2 rooms over from the party wall and his bathroom.
 What I would like to do is lessen the noise as much as possible in my bedroom. So would MLV under my carpet help any of this?
 If so.
-Would laying the MLV over the carpet underlay be the same thing as using a MLV with an open cell backing? and would there be a lot of benefit to using one with a closed cell backing for a higher cost.
-Also would you have to glue down the MLV?
-when sealing the MLV to the edge of the walls would there be any benefit to using green glue or would an acoustical caulking do the same thing?

Thanks for your help

[Randy S]

You should use MLV w/ Closed cell foam underlayment underneath your carpet and padding. This needs to go wall to wall foam side down. Lead tape for the seams and acoustical caulk for the perimeter, you do not glue MLV w/ Closed cell foam down, you let it float.

http://www.soundproofing.org/infopages/flooring.htm

 What I would like to do is lessen the noise as much as possible in my bedroom. So would MLV under my carpet help any of this? YES
 If so.
-Would laying the MLV over the carpet underlay be the same thing as using a MLV with an open cell backing? YES and would there be a lot of benefit to using one with a closed cell backing for a higher cost. YES because this has additional sound absorption foam
-Also would you have to glue down the MLV? NO-when sealing the MLV to the edge of the walls would there be any benefit to using green glue or would an acoustical caulking do the same thing? Acoustical caulk is correct for this not Green Glue