It's time to put frivolous cases like this to bed. As far as I am concerned she has to be able to pass a blind test multiple times to prove she can tell when a wi-fi signal is transmitting or not.
Ringing in the ears is usually caused poor circulation around the cochlea.
I'm not saying that she very well might be the true outlier and really can hear this but 1.7 billion is ridiculous. I can see, at best, if she really can pass a blind test that the city owes her the cost of turning her house in to a Faraday cage to block out the wi-fi, plus maybe an extra 100k for suffering.