Testing (requiring teacher support):
1. Open the decibel measurement app and stop button at the bottom of the screen by pressing the white square.
3. When ready to test the sound of the prototype, play the saved recording at your choice of volume (just be consistent for all groups), and press the record button (the white circle) at the same time. Once finished, press the stop button again.
4. Next, hit the save button to the right of the record button.
5. Finally, analyze the graph to find the loudest sound recorded. Do so by pressing the saved graph list to the left of the record button (on the opposite side of the save button). The recording at the bottom of the list will be the most recent (helpful to know if you have multiple recordings saved).
6. Choose the recording in the saved list and use the decibel number for the tallest peak (the white peaks) on the graph as each group’s score.
7. Using chart paper, add each group’s score using a bar graph for visual representation.
8. The group with the quietest sound (the shortest peak in decibel) is the winner of this challenge activity.