You can really know a lot about a person from the way he or she converses with others.
Each person has a unique voice. The pitch, the tone, the shape of the mouth when conversing. I believe that emotion is always there when a person speaks. The way a person speaks clearly defines what the person feels. Though there are times when doubts will set in. What if he or she is faking it? what if he or she is trained or is so good at masking his or her emotions? You can never tell.
