Flat-panel speaker
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United States of America Patent
Stats
-
Dec 23, 1997
Grant Date -
N/A
app pub date -
Apr 6, 1995
filing date -
Apr 6, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite loudspeaker diaphragm is disclosed having first and second substantially flat carbon fiber skins, and a honeycomb core sandwiched between the first and second carbon skins. In a preferred form, each carbon fiber skin comprises a sheet formed of primarily unidirectional carbon filaments bound together by an epoxy resin. In the preferred embodiment, the honeycomb core is formed of nomex, and is glued with epoxy to the first and second carbon skins, and then heated. The sandwich diaphragm is manufactured so that the direction of the carbon fibers of the cross plies of each outer skin are out of phase relative to each other, preferrably in the range of approximately ninety degrees. The improved diaphragm is used in an flat-panel loudspeaker system having improved performance at higher frequencies.
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Cited Art Landscape
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