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How does a stethoscope work?

Stethoscope

A stethoscope is a device, which is used by the doctors to listen sounds inside the body. The sounds are picked up at the surface of the body and transmitted along tubes to earpieces. The first stethoscope was a wooden tube invented in 1815. The modern version was introduced in the late 1800s. Rubber tubes lead from a disc or cone to two earpieces. Sounds picked up by the cone are carried through air in the rubber tubes to the earpieces. This very simple device is still the easiest way of listening to a person’s heart and lungs, which helps the doctors in diagnosing the patient.

 

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