Internal noise consists of distractions inside the brain, such as thoughts, that interrupt the communication process. Internal noise occurs while a person is trying to speak. It can cause the person to lose sight of what he wants to say or is trying to communicate.
Internal noise can be positive or negative and is often referred to as the voice inside someone's head. Negative internal noise may consist of thoughts or doubts when a person is trying to defend himself verbally or argue a point. Positive internal noise can still cause a distraction, but it may still prove to be encouraging and supportive when a person is speaking.