| 摘要 |
PROBLEM TO BE SOLVED: To attain a speaker apparatus with a simple configuration capable of remarkably improving sound quality. SOLUTION: The speaker apparatus provides an electromagnetic force to a voice coil on the basis of a sound signal to be supplied, and generates a sound wave according to the sound signal while vibrating a diaphragm fixed on the voice coil. The speaker apparatus is provided with a pole piece erectly provided on the center of a yoke, a circular first magnet fixed on the yoke so as to surround the pole piece, and an electromagnetic force generating means having a circular plate stacked on the first magnet. The electromagnetic force generating means has a second magnet stacked on the pole piece magnetized in a direction reverse to the first magnet and having predetermined thickness, and the voice coil is held in a non-contact state in a magnetic gap formed among a plate, the pole piece and the second magnet. COPYRIGHT: (C)2005,JPO&NCIPI
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