We agreed that while we think all the air molecules colliding is what's happening, we really wanted to zoom in on what was happening to the air molecules, and an original investigation idea was to use a simulator to help us. So Mrs. Brinza found one that has been seemingly helpful to us. Here's what we figured out from the simulator:
The simulator also allowed us to explore what happens as the amplitude and frequency change to all the air molecules colliding. But we'd like to see this for ourselves, and maybe measure it, too?