At the end of the listening process you
a. choose a sound to focus on
b. make an effort for recall
c. provide feedback
d. assign meaning

Listening is an engaged effort. At the end of listening, be it a conversation or lecture, you should be able to provide feedback. This may be in the form of a reply, applause, or a gesture like a nod. It is always helpful to the speaker to indicate if you are understanding the context of what they are saying.

Googly eyed because it sounds like a silly thing to call someone