| 摘要 |
A diaphragm of a loudspeaker is made up of a plurality of laminated composite sheets each including a number of fibers, for example, carbon fibers having a high Young's modulus to density ratio, and a matrix bonding together the fibers. Each composite sheet is divided into a plurality of adjoining sections formed by dividing the composite sheet about the center axis of the diaphragm. The divided composite sheets are laminated such that joints between adjacent sections of one composite sheet do not overlap joints between adjacent sections of the other composite sheet. In other embodiments a similar composite sheet is spirally bonded to the outer surface of the diaphragm or rings having different diameters and made of similar composite sheet are coaxially bonded along the outer surface of the diaphragm.
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