I have been playing around with a dismantled SPZ geophone damping and find
if you short the leads to the coil and then drop the mass
the mass will descend slowly, I guess from meeting
the generator current being dissipated by the
internal resistance.

Questions arise from this.

1. if there were no internal resistance (superconductor)
    then when the leads are shorted the mass would fall
   a bit then stay forever hovering ?


2.the geophone is acting just like a rotating electrical generator
armature developing torque under electrical loads ?

3. It seems to me that seismic noise rarely hits the resonant frequency and
    you might do better to not increase the damping over what already
    is there in the mechanical and physical sense ?

4. Does the rate at which the geophone mass drop under heavy damping
    represent some new fundamental Eigen frequency ?

5. Can anyone provide me with high school math
    models which represent the mechanical and
    electrical behaviors of the geophone ?
   High school math being trig and algebra
   minus the calculus ?


note: it seems to me for greatest sensitivity you pick
an Eigen freq not contained in EQ signals then do no damping at all. ??
This [little damping] should work for weak EQ signals and not close strong ones ?

Thanks for any answers,
geoff


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