Abstract: A system and method quantifies correlation between a road surface profile and road noise. The profile and interior noise and a running speed of a vehicle are simultaneously measured in real time, and by using measurement information, correlation between the profile and the road noise is quantitatively objectified. The profile is measured in real time and, at the same time, interior noise and running speed are measured. Data of the profile is converted into a displacement-based signal using the running speed data. An error component corresponding to a distance frequency that cooperates with the profile is removed by using the measured running speed data. A mean profile depth (MPD) is calculated by using the profile data. Road noise is measured from the interior noise data. And MPD is matched with the road noise to generate a correlation graph.