所有3M™ Littmann®听诊器都具有先进的声学性能和舒适的贴合感，这得益于每个听诊器内置的创新功能。了解每项功能的操作原理，以及如何借助这些功能在工作中出色地完成听诊任务。
Snap-tight and soft-sealing for an excellent acoustic seal and comfortable fit.
Snap-tight and soft-sealing for an excellent acoustic seal and comfortable fit.
To resist skin oils and alcohol, it is made without natural rubber latex or phthalate plasticizers.
To resist skin oils and alcohol, it is made without natural rubber latex or phthalate plasticizers.
Available as either a one-sided variant with tunable diaphragm, or a two-sided variant with a diaphragm on one side and a bell on the other.
Available as either a one-sided variant with tunable diaphragm, or a two-sided variant with a diaphragm on one side and a bell on the other.
Switch between hearing high- and low-frequency sounds by adjusting pressure on chestpiece.
Switch between hearing high- and low-frequency sounds by adjusting pressure on chestpiece.
Adjustable by squeezing or pulling apart the eartubes.
Adjustable by squeezing or pulling apart the eartubes.
Made of an aerospace aluminum alloy for strength and lighter weight.
Made of an aerospace aluminum alloy for strength and lighter weight.
Eliminates the rubbing noise typically heard when using traditional twin-tubed stethoscopes (only applicable to the 3M™ Littmann® Cardiology series).
Eliminates the rubbing noise typically heard when using traditional twin-tubed stethoscopes (only applicable to the 3M™ Littmann® Cardiology series).
Used to index, or open, the side of the chestpiece that you wish to use.
Used to index, or open, the side of the chestpiece that you wish to use.
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听诊高频和低频声音
各种听诊声音在低频和高频范围内占据一定的区域。如图所示，其中一些频率基本上彼此重叠。因此，临床医生必须分离高频和低频声音，并用听诊器检测和区分细微的声音。
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悬浮式可调振动膜技术使听诊更有效。通过调整施加在胸件的压力，临床医生可以分离出每个频率范围来判定细微的声音。
轻压可以听取低频音源，加大压力则会限制听诊膜移动，阻止低频音源，从而能够听取高频音源。
此外，悬浮式可调振动膜技术对于用户来说简单易行——无需为了听到不同频率的声音而移除、反转和重新定位胸件。
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悬浮式可调振动膜技术的优势
方便性： 只需更少时间定位听诊器，便可听诊各种频率的声音
比较性： 低频和高频音源分离有助于进行关键比较，提供有价值的评估。
一致性： 您不必担心将听诊膜放在发现异常的部位。只需施加压力。
胸件
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精密加工产品
3M™ Littmann®听诊器胸件经过精密加工，既能捕捉声音，又具有美观、圆滑的外形。可以是可调振动膜单面胸件，也可以是双面胸件，一面为可调振动膜，一面为钟面。
3M™ Littmann®通用型第三代听诊器和3M™ Littmann®心脏专科第四代听诊器的胸件均为双面，分别带有适用于成人和小儿的可调膜式听头，这意味着您只需要一部听诊器便可听诊所有年龄阶段和体型的患者。
找到最适合您的产品组合。
按导管颜色、胸件饰面等筛选3M™ Littmann®心脏专科第四代听诊器和通用第三代听诊器。
查看3M™ Littmann®系列听诊器
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3M™ Littmann® 听诊器
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