Soundproofing an up-down style two family home in RI

[KEVIN FLYNN]

Anyone know how to soundproof an up-down 2 family home?  I'm located in Rhode Island and my 1st floor tenant is worried about the noise from upstairs, mainly walking around seems to bother them.  I have about 8-9 feet of ceiling height and I'm not sure if I can put a barrier 6inches to a foot to reduce the noise transfer.  If anyone knows a contractor who may be able to help that would be awesome!  I could tell them they have to deal with it but I'd rather give them a quiet space.  Thanks!  Also I heard that spraying insulation may help but only slightly, I'd prefer to do it the right way once.