If you can just get a cheap pair of cordless ones, I turn them on so she can hear them and approach her then turn away. Kind of, walk up to her but not all the way the turn and walk away. Keep getting closer and closer each time you do it. That should help her see that they won't do anything. Then once she's not jumpy around them just let her feel the vibration, and work your way to the area you want to do.