AcCorps, an open source stethoscope (WIP)
thingiverse
AcCorps is an open source 3D printed stethoscope for acquiring fetal heart sounds, but it will also work with adult heart sounds. This device was optimized to provide mechanical acoustic amplification in the low-frequency band corresponding to heart sounds. Its design draws inspiration from the human cochlea, with a length increased by a factor of seventy to target heart sounds. The stethoscope is connected to an electret microphone (a specific model reference AOM-6738L-R, but it will work with any 9.6mm diameter microphone that has a good response in the low frequency band) and records sounds using an Android smartphone connected via the jack input. AcCorps_LUNG features a 70 cm tube length, allowing mechanical resonance at ~120Hz (lung sounds). AcCorps_HEART has a 140cm tube length, enabling mechanical resonance at ~60Hz (heart sounds). This part requires high precision 3D printing. To connect the microphone, you will need a TRRS jack cable. Connect the ground and MIC line to the microphone for proper function. For more information, visit: https://www.researchgate.net/publication/336331178_AcCorps_A_low-cost_3D_printed_stethoscope_for_fetal_phonocardiography
With this file you will be able to print AcCorps, an open source stethoscope (WIP) with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on AcCorps, an open source stethoscope (WIP).