Click on the port popover for Refreshed at Time so it will stay open on the canvas. Then click on the Make Noise Image node’s Time input port to open its popover.
As you can see, the events and data shown in the two port popovers are the same. A stream of information is flowing out of the Refreshed at Time output port, along the cable, and into the Time input port.
As each event hits the Make Noise Image node’s Time input port, it prompts the Make Noise Image node to do its job. The node does so, using the data that accompanied the event as one of its parameters.