That's a good questions.
The way one senses energy can be very different from another's way of sensing energy. And to add to that, every object has it's own signature energy wavelength to establish itself seperate from the rest of the universe. This can be a challeng for people who are learning to get in touch with the varying wavelengths of the universe.
A good thing to do is to practice emoting. What that means is to practice being angry, sad, passionate, lustful, joyful, and recognize how each one makes you feel, inside and out. Since the way you may compartmentalize wavelengths will be on the basis of emotional states of being, this is a good exercise to begin with. Once you can recognize your own vibrational states of being, then you can recognize other's vibrational states of being. And even objects.
Remember, in order to understand the universe around us, we must first understand ourselves.