The WSU tolerance curve describes the relationship between effective acceleration and time duration of effective acceleration for brain injury in forehead impacts. This relationship represents impacts against plane, unyielding surfaces. The HIC was developed to rate resultant dummy head accelerations according to the WSU tolerance curve. In the ECE/GRCS draft regulation concerning occupant protection in frontal passenger car impacts, a head protec— tion criterion (HPC) is now being considered which limits the application of BIG in the case of dummy head impact.
In this paper, problems of HIC application in crash testing are discussed.