Why is resonance such a bugger to spell...but I digress.
As using radio waves would not be too effective I suggest using soundwaves to make the tinfoil hats vibrate.
Uses runs from an easy listening channel (with adverts) to just for fun making them play the Ghostbusters theme.-- not_morrison_rm, Aug 31 2016 Not sure I understand. Resonance happens at specific frequencies. And the voices in my head are telling me that getting tinfoil to go into significant resonance is going to take some doing. Too much damping. But maybe that's what they want me to think.-- RayfordSteele, Sep 01 2016 random, halfbakery