Vibrations connecting us?

Since the past few days, I have been thinking about how vibrations travel across through your mind and convey messages to people sitting far from you. I have noticed that sometimes staying quiet can express much more than talking about it all the time. But how does this happen? How does a person sitting far from you and not in contact with you get to know what has been going on in your mind? What is it that connects us? Is it ‘vibrations’ only or am I using some wrong term?

I have been wondering whether these 'vibrations' that I call are something I just feel or think to be present or they actually exist. Any thoughts?