GliaX’s 3D-printable stethoscope costs $2.5-$5 to produce and matches the Littmann Cardiology III in a peer-reviewed PLOS ONE validation study.
Key Takeaways
Peer-reviewed validation published in PLOS ONE confirms acoustic performance equal to the Littmann Cardiology III, the clinical gold standard.
All structural parts are 3D-printed STLs (PETG or ABS); 100% infill is mandatory or the stethoscope produces incorrect sound.
Diaphragm is cut from a $9 plastic report cover; silicone tubing in two diameters and standard large earbuds complete the BOM.
PLA is explicitly unsupported due to heat deformation and early spring failure; PETG or ABS required.
Designs are parameterized in CrystalSCAD/OpenSCAD with full source files included; licensed under TAPR OHL.
Hacker News Comment Review
Sterilization is unaddressed in the repo; no guidance on material compatibility with hospital-grade disinfectants, which is a real gap for any clinical deployment.
Brand stethoscopes run $100+ and generics around $30, so the $2.5-$5 BOM framing hits hard; commenters found the price delta surprising.
Whether the device is passive (purely acoustic, no electronics) was not immediately clear to readers, suggesting the README could benefit from a one-line design overview up front.
Notable Comments
@samantha_greene: flags the absence of assembly photos as a missed opportunity for a hardware repo at this stage.
