Active listening can also involve paying attention to the speaker's behavior and body language. Having the ability to interpret a person's body language lets the listener develop a more accurate understanding of the speaker's message.
Source: Boundless. “The Importance of Listening.” Boundless Communications. Boundless, 21 Jul. 2015. Retrieved 13 Sep. 2015 from https://www.boundless.com/communications/textbooks/boundless-communications-textbook/learning-to-listen-and-helping-others-do-the-same-5/understanding-listening-29/the-importance-of-listening-132-8285/