1. The difference in folding effect
Generally speaking, the larger and heavier the stethoscope, the better the sound pickup effect; on the contrary, the smaller and lighter, the easier it is to carry. The dazzling new stethoscope is designed to solve this contradiction.
2. Fold auscultation size
The larger the contact surface between the auscultation head and the body, the better the sound effect will be picked up. However, the surface of the human body has a curvature. If the chest piece is too large, the ear can not be in full contact with the human body. The sound will not only not be picked up well, but also leak out from the gap. Therefore, the size of the auscultation head should be based on clinical needs. At present, the diameter of stethoscope chestpieces is almost uniform between 45-50 mm. Special ones such as pediatric chestpieces generally have a diameter of 30 mm, and newborns have a diameter of 18 mm.
3. Folding auscultation material
Material plays an important role in sound effects. Sound is transmitted through air or matter, and finally converted into heat and disappears. The transmission of sound waves has almost no attenuation in heavy metals, and is prone to attenuation in lighter metals or plastics. Therefore, high-grade stethoscopes must use heavy metals such as stainless steel or titanium.
4. Fold the conductive part
The sound transmission line is also very important. The larger the inner diameter of the pipeline, the shorter the length, and the thicker the tube wall, the better the effect of the stethoscope. The international standard length is 27 inches.
