title: A low-cost 3-D printed stethoscope connected to a smartphone.
abstract: We demonstrate the fabrication of a digital stethoscope using a 3D printer and commercial off-the-shelf electronics. A chestpiece consists of an electret microphone embedded into the drum of a 3D printed chestpiece. An electronic dongle amplifies the signal from the microphone and reduces any external noise. It also adjusts the signal to the voltages accepted by the smartphones headset jack. A graphical user interface programmed in Android displays the signals processed by the dongle. The application also saves the processed signal and sends it to a physician.
authors.forename: Carlos
authors.initials: C
authors.lastname: Aguilera-Astudillo
authors.forename: Marx
authors.initials: M
authors.lastname: Chavez-Campos
authors.forename: Alan
authors.initials: A
authors.lastname: Gonzalez-Suarez
authors.forename: Jose L
authors.initials: JL
authors.lastname: Garcia-Cordero
mesh_terms: D006321:Heart / Q000000981:diagnostic imaging / Q000502:physiology; D006801:Humans; D066330:Printing, Three-Dimensional / Q000295:instrumentation; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D000068997:Smartphone; D019023:Stethoscopes / Q000191:economics