If you can't hear, arrange things so you can. Move away from sources of noise (student or mechanical). Sit where you can see the speaker easily, and where other distractions are at a minimum. Look for the main idea or ideas of the presentation.
Maintain eye contact with the instructor and Focus on content, not how the instructor is delivering the information. Stay active by asking yourself questions. Here are some questions you can ask yourself as you listen. What key point is the Instructor making? How does this fit with what I know from previous lectures? How is this lecture organized?
“Positive thinking gets Positive results”