Every artifact shows a representation of sound traveling through a repeated pattern, with radiating crescent lines the most common, showing up in Artifacts A, B, C, D, and E. Additionally, we see more instances, compared to the initial models, of sound being represented as radiating in multiple directions, as we can see in Artifacts A and F (multidirectional) and Artifacts B, C, and D (bidirectional). Two Artifacts, B and F, have included a distinction between soft and loud sounds. 

In addition to these common elements, there are several noteworthy elements in specific artifacts. 

Artifact D represents the AirZooka that was used in Station 5 during Chapter 3; it is worth noting the absence of a distinction between sound waves (presented in the prompt) and other types of pressure waves traveling through the air. Artifacts C and D, though, identify that energy (or power) is transferred by waves.

The close-up representation of sound in Artifact G is different from any of the other initial or revised models. Is this student conceptualizing sound as a transverse wave, rather than a longitudinal wave? Or is the student making visible an abstract, graphical representation of the wave pattern?

Perhaps due to the written instructions, most artifacts focused on the mechanism by which sound travels rather than the second half of the driving question, which connects to how information is transmitted. Artifact E the exception; it interestingly represents snippets of information carried within the pattern as it travels through the air.