Noise levels

[zoiner]

Has anyone ever recorded noise levels from:

Punch card machines and verifiers

Punch card sorting machines


A long shot I know but it would be really useful if anyone out there has such data, or a link to a study
http://www.vintage-computer.com/vcforum/images/smilies/icon_lol.gif
:lol:

[ahm]

Someone may have, back when those items were still in prevalent use.
I doubt anyone here has, though.
Why? What sort of paper are we supposed to be writing for you?
We certainly don't work for free.

[zoiner]

It WAS a hearing loss litigation report, its written and just been sent on the basis of some clever guesswork:). (A 1959 reading of 90phons for accounting machines and a 1967 value of 67dB(A) for a paper tape punch.)

There is a Czeck paper from 1964 I have been unable to get and a similar German paper from 1969, neither of which can be seen or bought over the web.

I was just wondering if anyone who collects such equipment has ever made tests.