| 摘要 |
PCT No. PCT/SE95/00971 Sec. 371 Date May 12, 1997 Sec. 102(e) Date May 12, 1997 PCT Filed Aug. 29, 1995 PCT Pub. No. WO96/07294 PCT Pub. Date Mar. 7, 1996An elongated, electrically conductive diaphragm is placed in a strongly magnetic field to produce a linear and an elongated sound source giving a high sound energy. At least two elongated diaphragms are positioned between intermediate and enclosing protected magnet elements, whereby the transverse length of the diaphragms are at least of the same size as that of the intermediate protected magnet elements. In this way, a sound without considerable interference merges at a short distance from the sources of the sound. By placing additional such sources of sound alongside each other, a broad sound source with a surface producing an essentially homogeneous sound field is achieved.
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