Well, it's said that all energy moves in waves. Light, heat, audio, even thought activity shows up as waves that can be measured. I don't know if emotional energy can be measured the way our brainwaves can, but if not, I'll bet that's coming sometime soon.
So, all these subtle waves moving around all the time, that's vibration as I think of it. If you're projecting out love or rage or lust, there is actual movement taking place, and humans are sensitive enough to feel that movement.
That doesn't mean you can't pick up the phone or send a letter though, for pete's sake.
