Being communicative means not only sending clear messages, but being tuned in to other people’s messages. A good communicator will recognize that these messages need some interpretation, whether this involves understanding gestures, facial expressions or even the meaning behind words. A sociable person likes being with other people but may not be a good communicator. For example, you might meet very sociable people in a pub or a bar, but apart from being friendly and smiling a lot they may not be able to discuss things intelligently or listen to what you have to say.

They are close, but not quite the same. If a person is sociable, they are able and willing to communicate and seek and/or desire the company of others. If a person is communicative, it means that they are willing and able to communicate. It does not necessarily say anything about companionship. For example, a prisoner under questioning might be communicative - willing to talk to police. However, that says nothing about his desire for companionship, though that might indeed be the case.

Thank you, Melyssa! :)

how to be heard * sorry

If you are SOCIABLE, is that to say that you are not afraid by people and you don't have any problem to speak with someone you don't really know. If you are COMMUNICATIVE, you know talk and propose your idea for instance. You know who to be heard. :)