LEOPOLD AUENBRUGGER (1722-1809) was born in 1722 in Graz, Austria, the son of a well-to-do innkeeper. He received his doctor's degree from the University of Vienna in 1752. He was physician to the Spanish Hospital there, until 1762.
In 1761 he published his Inventum novum ex percussione thoracis humani ut signo abstrusos interni pectoris morbos detegende in which he described the result of seven years experience with a new method of physical diagnosis-percussion. He described the technique of percussion, which he performed "slowly and gently with the tip of the fingers brought close together and extended". He also described the sounds given by the normal chest as well as in hydrothorax, in cavities, in hydropericardium, and in cardiac enlargement.