| 摘要 |
A loudspeaker apparatus utilizing a ribbon diaphragm (12) which is capable of transforming an electrical signal into an audio acoustical signal. The diaphragm includes a first side (86) and a second opposite side (112). First and second magnets (36, 38) are also employed in the present invention and are mounted to the edges of the diaphragm (12) such that the diaphragm (12) lies in the magnetic field generated by the pair of magnets (36, 38). A first plurality of spaced magnetic plates (84) are stacked and extend continuously from the first magnet (36) to the second magnet (38) at the first side (86) of the diaphragm. The first plurality of plates form a throat-shaped cavity (90) of a pre-determined size. A second plurality of spaced magentic focusing plates (114) are stacked on the second side (112) of the diaphragm in the same manner. A plurality of sound damping shims (102), each interposes each of the first plurality of magnetic focusing plates on the sides of the throat-shaped cavity (90). An acoustic coupler or horn (128), each interposes may be easily attached to throat-shaped cavity (90) to enhance the lower acoustical response range.
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