Speaker
A speaker includes a magnetic circuit that is formed in the center of a frame , a voice coil that is inserted in a magnetic gap of the magnetic circuit , a damper that is fixed to the frame and the voice coil , and a vibrating plate that is fixed to the frame and the voice coil . An opening is provi...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A speaker includes a magnetic circuit that is formed in the center of a frame , a voice coil that is inserted in a magnetic gap of the magnetic circuit , a damper that is fixed to the frame and the voice coil , and a vibrating plate that is fixed to the frame and the voice coil . An opening is provided in a bobbin of the voice coil . The area of the opening is 0.3% or less of the radial cross-sectional area of the bobbin of the voice coil |
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