Adding Drywall to Typical Ceiling Assembly
Acoustical Reference Only
The standard ceiling upgrade is a basic level of improvement. It does not address the vibration that remains in the subfloor and joists overhead, and therefore does not reduce the vibration that may flank from the upstairs floor directly into your walls. It will reduce airborne noise more than it will reduce the impact noise.
This method adds Mass, one of the 4 Elements of Soundproofing.