Pinard stethoscope/horn
thingiverse
A Pinard Horn is a Tool Used to Listen to the Heart Rate of a Fetus During Pregnancy. This is My Second Attempt (the First One Was Bigger and Didn't Work), but This One Is Fully Functional - Although It Can Be Hard to Find the Beats or Even Impossible Depending on the Position of the Fetus. Next Step Would Be to Add a Microphone and See If It Can Record Something:
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