Abstract: An electronic stethoscope chestpiece includes a chestpiece housing having an interior space including a cavity extending from a radially enlarged open end to a radially constricted aperture to form a stethoscope bell. The radially enlarged open end and radially constricted aperture have a common radial axis. Another part of the interior space includes a circuit board positioned above the radially constricted aperture that mechanically supports a headphone connector and a sound detector located at the radially constricted aperture. The circuit board includes a first electrical channel adapted to transmit an electrical signal corresponding to sound in the stethoscope bell to a portable electronic device that records sound and a second electrical channel adapted to allow an audio signal transmitted from the portable electronic device to pass to the headphone connector.