Josef Leopold Auenbrugger, (1722-1809)
Austrian physician who introduced the clinical diagnostic tool of percussion, which involved applying his ear to the patient while tapping lightly on the patient's chest. His invention had its origins in testing the level of wine casks in the cellar of his father’s hotel. It was published in his book, "New Invention by Means of Percussing the Human Thorax for Detecting Signs of Obscure Disease of the Interior of the Chest Wall" (1761). Auenbrugger plotted the outlines of the heart through percussion and focused his later studies on tuberculosis.