The moment she stepped into the stage, the deafening roar of the abundant talking died down little by little until it became hushed whispers. There were some perks of using the element of surprise, since everyone expected Adam to step out and do the presentation, they were clearly blindsided when she stepped in. Now she wouldn't be wasting too much time to have them keep quiet.
She felt weird about having to make an audience made of college professors and doctors quiet down and pay attention to the lecture. but that was the truth of this situation. she knew that no one was there for what she was about to say, they were there for the show.