The news device is on sale now for $199. Another variant, which replaces the old stethoscope entirely, is on sale for $299. “The real value is if engineers can figure out ways to analyze the sounds using algorithms,” said a specialist from Eko Devices. Actually, trials are conducted in this direction at two San Francisco hospitals. The classic stethoscope, which is an acoustic medical device for auscultation, or listening to the internal sounds of an animal or human body, was invented in France in 1816 by René Laennec at the Necker-Enfants Malades Hospital in Paris and was perfected during time (Irish physician Arthur Leared invented the binaural stethoscope and many others contributed).