There are seven things that are considered to be barriers to communication. You have physical barriers like doors or location. Perceptual barriers like the fact that we all see the world differently. There are emotional barriers lack of trust can inhibit communication. Cultural and language barriers are pretty obvious. Then there are gender barriers in that fact that women say things differently
. than men. Last are the interpersonal barriers which are how distant emotionally you are from the person you are speaking to. For more information try http://www.hodu.com/barriers.shtml.