| 摘要 |
An improved lightweight, stiff member for use as a speaker diaphram is formed from a porous layer of high stiffness fibers. The fibers are randomly oriented, spaced-apart, and crossover each other at given points to form a porous layer with a given thickness. The fibers are bonded to each other at the given crossover points. A gastight film is also bonded to the layer of fibers thereby providing a gastight member having high flexural stiffness.
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