If something induces a current one could probably hear it, especially with a low output cart. I don't think lifting the motor at least a quarter of an inch above the lp is going to show much of anything as far as the tiny magnetic fields that these appear to be. Static, on the other hand, has been known to induce snaps and pops with an arm still on the rest. But that is built up potential that wants to jump to equilibrium. I don't know if this "technique" is actually removing magnetism or just causing them to orient differently.
I seem to recall that someone did try to measure this. Maybe it was soon after Fremer's article, I'll see if I can find it.
I seem to recall that someone did try to measure this. Maybe it was soon after Fremer's article, I'll see if I can find it.