Me too. Oh I know it is probably because I do know him that well. But at times I hear my mom too and she has been gone for 9 years. I'm sure it is just all up in my head. I feel that way about smells too. Like the cologne mamma use to wear. It brings on a certain "peace" for me.
I would guess you really have a good enough connection that you do hear him without words. With her as well, your mind is connected with them. I think that people have communicated that way for a long long time. Only in the past years have people had too much other junk mixed in and have a harder time hearing because of it. I still hear from dad but I am comfortable with that so it doesn't surprise me. I know those things with the boys too and the grand kids. It is a stronger connection than with others.
They say there is a reason that people tend not to be there when there is a disaster, they had a premonition. Makes good sense to me. Sometimes even though you want to ignore the knowledge is there and you just know it is right.