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Updated by Stacey D on Oct 09, 2018
Stacey D Stacey D
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Learn more about stethoscopes and how they are used in the medical profession.

A stethoscope is a medical instrument used to listen to sounds produced in the body, especially those that emanate from the heart and lungs. Most modern stethoscopes are binaural; that is, the instrument is intended for use with both ears. Stethoscopes comprise two flexible rubber tubes running from a valve to the earpieces.


The stethoscope is an acoustic medical device for auscultation, or listening to the internal sounds of an animal or human body. It is often used to listen to lung and heart sounds. It is also used to listen to intestines and blood flow in arteries and veins.

Review of the 3M Littmann Master Classic II Stethoscope

The 3M Littmann Master Classic II Stethoscope is convenient with a single-sided master chest-piece and superior acoustic sensitivity. Students, emergency room nurses and veterinarians all recommend this precision diagnostic tool. This stethoscope consistently delivers superior quality in a variety of medical settings.