| 摘要 |
An electroacoustic transducer of the present invention includes a diaphragm 3 having a periphery as a fixed end, a coil 4 having an axis perpendicular to the diaphragm 3 and 6 attached centrally to the diaphragm 3 , and a direct current magnetic field generator fixed in position as spaced apart from the coil 4 by a gap provided axially of the coil 4 . The diaphragm 3 is driven by applying to the coil 4 a magnetic flux emitted from a surface of the direct current magnetic field generator that faces the coil 4 . The direct current magnetic field generator includes a ring-shaped outer magnet 5 located coaxially with the axis of the coil 4 and magnetized in the direction perpendicular to the axis, and an inner core 6 including a ferromagnet and located in the central hole of the outer magnet 5.
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