| 摘要 |
A stethoscope chest piece comprising a coupling element fitted within a sounding element, the two elements being relatively rotatable about a common axis; the coupling element having at least one air passage therethrough which is capable of being connected at one end to one or more listening tubes and which at its other end opens into a surface which lies in a male surface of revolution about the axis; the sounding element having three or more listening devices each oriented in different directions and each having an air passage therethrough, the air passage of each listening device opening at one end thereof into a surface, and the surfaces of all the listening devices lying in a common female surface of revolution about the axis, the male and the female surfaces of revolution being complementary so that on relative rotation of the elements about the axis the or each air passage through the coupling can be placed in communication with the air passage of any selected one of the listening devices. |
