The Alpha prototype was constructed using foam board, glue, memory foam, and some elastic straps. The primary goal of this prototype was to determine the fit and verify the mounting methods of both the Internal Dampening Unit to the shell, and the Entire system to the User's face.
The prototype also had the location of the buttons drawn on and a few different locations were tried to determine how and where to intuitive place the buttons for the user. Finally, the alpha prototype was also able to attenuate the user's sound to an extent. Further testing will be performed with different materials to determine the best material for the job.
Find more about the details of this concept: