| 摘要 |
PURPOSE: To provide an electromagnetic acoustic transducer, the positional accuracy of members of which can be enhanced considerably and that can exhibit a stable characteristic with high efficiency. CONSTITUTION: The electromagnetic acoustic transducer 1 is provided with a base 24 made of a magnetic material, a magnetic core 22 made of a magnetic material and stood upright on the base 24, a diaphragm 20 that is made of a magnetic material and supported by the tip of the magnetic core at an interval of air gap from the tip, a magnet 25 that configures a magnetic circuit with the base 24, the magnetic core 22 and the diaphragm 20 for supplying a static magnetic field, a coil 23 wound on the magnetic core 22 for supplying a vibration magnetic field to the magnetic circuit, and a housing 30 or the like that is formed integrally with the base 24 and the magnet 25. A housing 30 is interposed between the base 24 and the magnet 25 and a planar shape of the base 24 has a part which extends outwardly from the width center of the magnet 25.
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