An electromagnetic transducer includes: a first diaphragm; a second diaphragm
provided in a central portion of the first diaphragm, the second diaphragm comprising
a magnetic material having a first opening in a central portion thereof; a yoke
disposed so as to oppose the first diaphragm; a center pole disposed between the
yoke and the first diaphragm, wherein the center pole has a shape which allows
insertion into the first opening; a coil disposed so as to surround the center
pole; and a first magnet disposed so as to surround the coil.
