Dynamischer Erschütterungsaufnehmer
Not sure it is military or had a use in the military!
But someone gave me this answer on a other forum;
I'd have to see pics from the different scales. what you can do is e.g. measuring the frequencies that are caused by by-passing road-traffic into the structures of houses.
easiest to test would be to connect and press the cylinder (r/h in box) to a metal structure and hit the structure with a wooden block; what it measures is the theoretical acceleration caused by the hit in meters per square seconds.
as every structure has a natural frequency - normally indicated in Hertz - you can also calculate the distance a structure moves.
if military then you could also guess the approximate distance of the ennemy's cannons when you know which model they use.
What do you think, please?
The words I used on my search are; "philips, GM5521, 1942" ....
It weights 8 kg,and measures 23/17/36 cm.
And found it in a house clearing.
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