Close Listening: How Sound Reveals the Invisible

Stethoscopes did not improving listening. It has been easier to hear by placing your ear directly on the body. Stethoscopes were only invented because of modesty. (Edit: and because of convenience for the doctor).

Of course new listening devices using microphones can improve on the human ear. But a rubber tube cannot.

loved this comment

  > There is a button for error reporting. You just need to scroll down to see it. 
  Oh and the scroll bar is hidden