Concrete Floor Apartment Noise. 1) airborne, 2) footfall, 3) structuraldeflection, and 4) floor squeak. Only major things should be audible and then heavily muffled. Currently living in one now.
3 Open Studio Apartment Designs
Recently, my neighbor came knocking to inform me she could hear loud music through the ceiling. A) ariel noise or airborne noise. The same materials could be used for the ceiling, it will just cost more to install.
Gallery of Concrete Floor Apartment Noise
There is a lengthy discussion on flatchat.com.au forum. However, the iic scale does not account for joist noises like squeaking or rattling. Modern single family homes, unless specified by the owner, have very poor insulation, especially on internal walls. They say the best way to tackle a noise problem is to tackle it at the source.