Loudspeaker Diaphragm
AssigneeEVA Automation, Inc.
InventorsThomas O'Brien, Martial Andre Robert Rousseau
Life of this patent
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Abstract
A loudspeaker diaphragm (12) comprising a woven fibre body supports damping material (25), for example PVA polymer, on a rearward-facing surface (24). The woven fibre body may be formed of lengths (14) non-metallic fibre material (for example glass fibre) coating with a thin metal coating (32). The mass of the layer of damping material (25) may be less than the mass of the woven fibre body. An attractive sparkly looking loudspeaker diaphragm (12) may thus be provided which damps undesirable vibration whilst providing a flatter frequency-response curve (50).
Claims20
A loudspeaker diaphragm having a forward-facing sound-radiating surface and a rearward-facing surface, the diaphragm comprising:
- a woven fibre body supporting a damping material which forms the shape of the diaphragm, wherein the mass of the damping material is more than 5% less than the mass of the woven fibre body.
A method for making a loudspeaker diaphragm, comprising:
- spinning a woven fibre body;
- applying liquid damping material to the spinning woven fibre body;
- and
- curing the liquid damping material so that the damping material transforms from a liquid material to a non-flowing material.
A method for making a loudspeaker diaphragm, comprising:
- forming a woven fibre body in the loudspeaker diaphragm using a non-metallic fibre material;
- and
- applying, using vapor deposition, a metal coating to the non-metallic fibre material.
A loudspeaker diaphragm comprising:
- a woven fibre body having a forward-facing sound-radiating surface and a rearward-facing surface that supports a damping material, wherein the woven fibre body is formed of metal-coated non-metallic fibre material, such that, when illuminated with light, the diaphragm appears to have a sparkly appearance;
- and
- wherein the woven fibre body comprises a resin which contributes to the stiffness of the woven fibre body and the mass of the resin is less than 20% of the mass of the damping material.
Dependencies are inferred from the claim text.