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Characterize earth propogated vibrations from a railroad track?

Question asked by rayj on May 18, 2017
Latest reply on May 18, 2017 by DaveThib

How might I characterize earth propogated vibrations from a railroad track?  While the sound propogation is loud, the ground vibrates significantly at about 3 Hz.  I would like to measure the earth mode and compare the results after abatement is applied.

I would like to measure the vibration at different distances to see natural attenuation.  As the source is always different, I need to make multiple measurement simultaneously.  I would like to collect the data for computer analysis.  I have no analog input equipment for the computer interface.  I would like to be able to bring a couple sensor arrays into the computer for spectrographic display and analysis.

I would appreciate all input.

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