Originally Posted by
wphamilton
A bicycle helmet, with a face shield constructed in similar fashion to the hockey helmet..
Gotcha
Originally Posted by
wphamilton
Although, in my opinion a hockey helmet would not likely be inferior to a cycling helmet with respect to impact protection.
My opinion differs but then you know what they say about opinions......
I did do some digging around though to see if there was a difference in standards between the two. It seems the pass/fail threshold of both styles of helmet is the same at around 300 g for most standards (I'm pretty sure a 300 g acceleration of your noodle is beyond fatal BTW) with a 5 kg headform but the final velocity used for bicycle helmets was much higher at 6.2 m/s vs. 4.5 m/s for the hockey helmets so the energy involved in the bike helmet testing is quite a bit higher, likely to account for the higher possible velocities on a bicycle versus hockey skates.
I'm somewhat ambiguous about these numbers though as a) the standards are updated periodically and I'm not paying to see the new information and b) research into motorcycle helmets has shown that a helmet that can survive a higher impact often transmits more energy to the head. To make the helmet less susceptible to damage you have to make it harder which in turn makes it less able to absorb energy.
Anyway, here are a couple of links to the information I've referenced (I didn't look for the motorcycle research, it's been years since I read it and I can't honestly be bothered):
http://www.cpsc.gov//PageFiles/11149...clehelmets.pdf
http://books.google.ca/books?id=p-rs...M%2090&f=false