How to calculate the noise emission with the pump room on roof with chillers operating and have their noise data of each chiller?

area of this nature shall be isolated from noise by providing extra accoustic linning in the fcu or the designated equipment employed to cool the room usually we take 3 mtrs of accoustic linning but we can increase to 5 to 7 mtrs this way the equipment becomes dull and the noise coming from the other equipments like pumps and chillers can be covering up for the same