| 摘要 |
A speaker of the present invention includes a frame at which a magnetic circuit is mounted, a voice coil, an arched diaphragm, and an edge made of material different from that of the diaphragm. A part of the voice coil is disposed at a magnetic gap formed by the magnetic circuit. The diaphragm is coupled with the voice coil, and the edge links the diaphragm with the frame. Further, the diaphragm includes an inner-diameter-fixing part to be joined with the voice coil, an outer-diameter-fixing part to be joined with the edge, and a top part formed between the inner-diameter-fixing part and the outer-diameter-fixing part to protrude forward. A part near the top part differs from a part other than the part near the top part of the diaphragm in at least one of thickness and density. This structure flattened sound-pressure-frequency characteristic over broad bands.
|
