| 摘要 |
PROBLEM TO BE SOLVED: To provide a multimode device having a speaker function that does not leak magnetism outside. SOLUTION: A magnetism canceller magnet is disposed in the vicinity of a yoke which forms a magnetic circuit for driving a voice coil and a diaphragm or a housing. The magnetic circuit may be formed by using the magnetism canceller magnet, which is an additional magnet, besides a driving magnet so that the magnets are arranged in series.
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