The unit beside me that has been empty for about 2 years has recently been rented out to a pet grooming business

. Now there are dogs that are intermittently barking throughout the day. This is really screwing up daytime sessions because my vocal booth is right on the other side of the wall where the main sound is coming from. I need help with solutions that will block out the dogs barking. Moving the vocal booth is a last resort...Heres a picture of our set up
As shown in the diagram above I am thinking of building a wall, leaving an air gap and putting something like owens corning or Roxul on the other side. Are there any other suggestions? Thanks in advance.