Wooden<unk>  A U.S. Army Reserve nurse uses a<unk>  in Uganda (2009). A<unk>  is a type of stethoscope used to listen to the heart rate of a fetus during pregnancy. It is a hollow<unk> , often made of wood or metal, about long. It functions similarly to an ear trumpet by amplifying sound. The user holds the wide end of the<unk>  against the pregnant woman's abdomen, and listens through the other end.
Pinard horn
Cervical cap
Cutaneous horn
Phrygian cap 
Unicorn horn
Tubex 
DermAtlas
Epicles