IBM PCAM info needed

Hi, I am applying to the VA for disability benefits based on a hearing problem that occurred while I was in the Air Force (early '60s). I worked in a very noisy PCAM room with lots of IBM 407s, repro punched card machines, and sorters. I have been trying to find articles or people who can verify these machines were sufficiently noisy to cause hearing problems. The VA turned down my first basic request, so now I need more details in just how loud these machines were. I know we have quite a few "old timers" on this board and I'm hoping someone can help me find the information I'm looking for. Let me know offline the names of any books, magazines or people that I may look for or contact concerning this issue or if you know of any websites that may contain this information. This note may not be quite "on topic", but I've run out of places to look for this information. Any help will be greatly appreciated. Thanks.... Bill Machacek Colo. Springs, CO bmachacek at pcisys.net