| 摘要 |
PROBLEM TO BE SOLVED: To provide a loudspeaker which can have a high driving efficiency and generate a loud sound even when the loudspeaker is small in size. SOLUTION: The loudspeaker includes a first magnet, a second magnet provided as to surround the first magnet, a yoke for linking the first magnet and the second magnet, a first voice coil, a first vibration plate connected to the first voice coil, a second vibration plate provided on the opposite side of the first magnet to the first vibration plate to be connected to the second voice coil, a first magnetic plate provided between the first vibration plate and the first magnet, and a second magnetic plate provided between the second vibration plate and the second magnet. The first voice coil is provided in a first magnetic gap between the first magnetic plate and the yoke, and the second voice coil is provided in a second magnetic gap between the second magnetic plate and the yoke.
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