Bishop P J, Briard B D
Can J Appl Sport Sci. 1984 Jun;9(2):94-101.
Seven brands of bicycle helmets were compared by means of a drop test using an instrumented Hodgson-WSU headform, on the front (F), rear (R) and left side (LS) locations from a height of 1.0m and on the right front boss (RFB) from either 1.0m or 1.75m. Acceleration signals from the headform were computer processed to yield peak acceleration and the Gadd Severity Index (GSI). Significant differences between helmets and within helmets at different locations were found. Helmets with crushable polystyrene liners were much superior to those with soft foam liners. The superiority of the polystyrene liners disappeared however when helmets were subjected to two consecutive drops to the same location (R). The results also indicated that for most cases the GSI was between 800-1200 but there were two helmets that had values in excess of 1500. Clearly not all bicycle helmets provide equivalent levels of protection and some are much superior to others.
通过使用装有仪器的霍奇森 - 华盛顿州立大学头模进行跌落测试，对七个品牌的自行车头盔进行了比较。测试在1.0米高度对头模的前部（F）、后部（R）和左侧（LS）位置进行，以及在1.0米或1.75米高度对头模的右前凸起（RFB）位置进行。对头模的加速度信号进行计算机处理，以得出峰值加速度和加德严重度指数（GSI）。发现不同头盔之间以及同一头盔在不同位置之间存在显著差异。带有可压碎聚苯乙烯衬里的头盔比带有软泡沫衬里的头盔优越得多。然而，当头盔在同一位置（R）连续经受两次跌落时，聚苯乙烯衬里的优越性消失了。结果还表明，在大多数情况下，GSI在800 - 1200之间，但有两个头盔的值超过了1500。显然，并非所有自行车头盔都提供同等水平的保护，有些头盔比其他头盔优越得多。
