What is the principle of the stethoscope used by doctors what is the principle of the stethoscope used by doctors

1, the front of the stethoscope is a large area of the membrane cavity, the body sound wave drumming membrane cavity, the stethoscope within the closed gas vibration, and plug into the ear end, due to the narrow cavity, the gas vibration amplitude than the front end of a lot more than the amplification of the patient's body vibration of the sound wave.

2, sound transmission pipeline is also very important. The larger the inner diameter of the tubing, the shorter the length, the thicker the wall, the more effective the stethoscope, the international standard length of 27 inches. Modern stethoscope sound transmission piping material is generally PVC, sound effect is good, beautiful, but poor tensile resistance, often bending, stretching easy to break. Stethoscope should be used after she is hanging flat on both sides of the neck, which can be seen in foreign TV dramas, is the standard method of wearing a quality stethoscope.