Stethoscope

The stethoscope is a medical device used to listen to the sounds made by the heart, lungs, and other organs in the human body. It was a significant advancement in diagnostic procedures which previously relied on placing the ear directly to the patient for auscultation.
 René-Théophile-Hyacinthe Laënnec France 1816 Stethoscope

The stethoscope is a medical device used to listen to the sounds made by the heart, lungs, and other organs in the human body. It was a significant advancement in diagnostic procedures which previously relied on placing the ear directly to the patient for auscultation.