Has anyone come up with a better way to mount a bathroom fan so as to
minimize the vibration they produce? Seems like the traditional 2 screw
mount of the normal NuTone bathroom fans would absolutely magnify any sounds
and vibrations produced by the unit.

Would it help to put a stringer on either side of the fan so that vibrations
are transmitted to the framing?

I don't want to turn this into a physics exercise so much as learn about
better methods used.