| 摘要 |
An acoustic transducer of planar shape. Specifically, the electromagnetic driving means for the acoustic transducer may have (i) magnetized means having thin-wall portions for forming pairs of spaced apart elongated gaps containing fixed magnetic fields, preferably by positioning second magnetized elongated substantially U-shaped member about first magnetized elongated substantially U-shaped member, and (ii) driver means consisting of a non-magnetizable conductor forming means for positioning electric conductor means in said gaps. The non-magnetizable, preferably rigid diaphragm for the acoustic transducer is operably attached to the electromagnetic driving means and may be supported by flexible means. The diaphragm may be a self-supporting tubular diaphragm, having a driver part and flexible support parts, which houses the electromagnetic driving means.
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