Worldwide no-1 search engine Google remains French famous doctor and physican René Laennec, considered the designer of the stethoscope with a unique doodle celebrating him on his 235th conception commemoration.

René Laennec discovered the configuration of the stethoscope while treating a female patient in 1816 at the Necker-Enfants Malades Hospital in Paris.


According to Laennec’s own account, the young lady being referred to appeared to be experiencing what he depicted as indications of ailing heart. Not able to utilize the customary strategy for determination in such a case (as the basic technique for putting the ear to the mid-section would be inapplicable on account of the patient’s age and sex), René Laennec remembered a straightforward and verifiable truth in acoustics, the considerable uniqueness with which we hear the scratch of a pin toward one side of a bit of wood on applying our ear to the next. He moved up a bit of paper into a chamber and connected one end of it to the area of the heart and the other to his ear and was satisfied to hear the activity of the heart unmistakably.


Laennec fabricated his first stethoscope as a 25 cm by 2.5 cm empty wooden barrel, which he later refined to include three separable parts. His clinical work allowed him to follow chest patients from bedside to the autopsy table. He was therefore able to correlate sounds captured by his new instruments with specific pathological changes in the chest, in effect pioneering a new non-invasive diagnostic tool. Laennec was the first to classify and discuss the terms rales, rhonchi, crepitance, and egophony – terms that doctors now use on a daily basis during physical exams and diagnoses.

The stethoscope, an acoustic medicinal gadget is utilized to listen to lung and heart sounds, digestion tracts, blood stream in supply routes and veins.

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