Your status can hamper effective communication if you are, for example, a king talking to a peasant, so your statuses are very different, and thus the communication is bound to fail. Also cultural differences - sometimes you just cannot understand why something is done in another country, which could in turn block the communication. Use of language also - if you are using swear words, for example, your interlocutor might not like that type of language. Knowledge about the subject - if you don't know what the person you are talking to is all about, the communication will not be successful. And lastly, speech disabilities may also hamper effective communication.
