Just like everything else, stethoscopes are getting smarter all the time. Take the 3M Littmann CORE Digital Stethoscope for instance: it is an app connected stethoscope that combines with your phone to visualize your heart sound waveforms. It comes with 40x amplification and active noise cancellation.
This smart stethoscope has analog and amplified listening modes. It combines with the Eko app to let you share your data with others. The 3M Littmann CORE Stethoscope is compatible with iOS and Android devices.