Stethoscope is the most commonly used diagnostic tool for internal and external women and children physicians. It is the symbol of physicians. Modern medicine begins with the invention of stethoscope. Stethoscope has been continuously improved since its application in clinical practice on March 8, 1817, but its basic structure has not changed much. It mainly consists of the pickup part (chest piece), the conductive part (hose) and the listening part. (earpieces) composition.

In the past, there was really no difference in the auscultation effect of stethoscopes. Nowadays, there are many kinds of stethoscopes. Different grades of stethoscopes are not very different when listening to normal sounds, but there is a world of difference when listening to noise. In general, the higher the quality of the stethoscope, the stronger the ability to discriminate the noise, and the longer it takes to use. A clinician should always have at least one pair of better quality stethoscopes.