In the year 1916 at the Necker-Enfants Malades Hospital in Paris, the stethoscope was invented by a French physician Rene Laennec by rolling up paper of plentiful sheets. In 1851, the binaural stethoscope was invented by Arthur Leared. A professor of Harvard School, Dr David Littmann in the 1960s created a new light weight stethoscope. In the year 1999, Richard Deslauriers patented the first external stethoscope of noise reducing.