| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized electromagnetic acoustic transducer with a high sound pressure where the mount height can be reduced. SOLUTION: The electromagnetic acoustic transducer 1 consists of a base 24 made of a magnetic material, a magnetic core 22 made of a magnetic material and standing upright with respect to the base 24, a diaphragm 20 made of a magnetic material and supported with a gap from a tip of the magnetic core, a magnet 25 configuring a magnetic circuit with the base 24, the magnetic core 20 and the diaphragm 20 to supply a static magnetic field, a coil 23 wound on the magnetic core 22 to supply a vibration magnetic field to the magnetic circuit, and a housing 30 or the like formed integrally with the base 24 and the magnet 25. A communication path 50 through which a rear side space of the diaphragm 20 communicate with the outside is formed to a side wall of the housing 30.
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