Engineering Passive Speakers
https://serc.carleton.edu/nextgen_wa/resources/activities/239212.html

Preservice teachers participate in an engineering investigation designed for upper elementary students. They explore physical science principles of sound, and then apply what they learn by designing a passive speaker that can amplify a cell phone while remaining esthetically pleasing.

Suggested Citation

Nollmeyer, Gus, and Baldwin, Kathryn. 2020. Engineering Passive Speakers. NextGen-WA. Accessed at: https://serc.carleton.edu/nextgen_wa/resources/activities/239212.html