This project aims to create a research-validated stethoscope whose plans are available freely and openly. The goal is for the bell to cost ~USD$1-2 to produce, and the rest of the stethoscope to cost approximately the same. You can see the peer-reviewed publication relating to this stethoscope's validation here: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0193087 Currently, the stethoscope resulting from this project functions as well as the market gold standard, the Littman...