Soundproofing Common Wall

[Brian Hellenbrand]

I was wondering if anyone has any experience with this. I have been reading up on it and it seems there are many issues that could cause sound from one unit to be heard in the other. The main sounds we are hearing are their toilets flushing. The toilet is really close to the common wall. They also kennel their dog sometimes in their basement right next to the common wall and his bark is like he is in the same room as our master bedroom. Hopefully that makes sense.

I have looked into using Green glue product and adding another layer of drywall but I am worried the sound is flanking through the basement or the ceiling. There is a fire wall between the two units that goes all the way up through the attic.

I am looking for a company that comes out and does a sound analysis to see where it might be coming from, has anyone done this?

Thank you!