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Glass-Fiber and Graphite-Flake Reinforced Polyimide Composite Diaphragm for Loudspeakers

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A newly developed diaphragm material especially suitable for loudspeaker drivers is described. The new diaphragm using this material features a high Young's modulus and an appropriate mechanical loss. The diaphragm is composed of a glass-fiber fabric base with a polyimide matrix polymer and a flaked graphite filler. Young's modulus for the new diaphragm is ten times higher than that of commonly used paper pulp diaphragms, with about the same mechanical loss.

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JAES Volume 31 Issue 10 pp. 723-728; October 1983
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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=4551

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