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United States Patent 6,934,402
Croft, III , et al. August 23, 2005
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Planar-magnetic speakers with secondary magnetic structure
Abstract
A planar magnetic transducer having enhanced magnetic structures which increases performance over a single-ended device but mitigates some of the drawbacks of double ended devices, including a supporting structure, a diaphragm incorporating a coil conductor at least a primary magnetic structure, and a secondary magnetic structure can be added, including mitigation of high frequency resonance and attenuation by providing a more open architecture, including spacing the magnets wider apart, configuring the inter-magnet spaces to provide better acoustic performance, using high-energy magnets, which magnets can be shaped to form at least a part of the shaped inter-magnet space.
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Inventors: Croft, III; James J. (Poway, CA); Graebener; David (Carson City, NV)
Assignee: American Technology Corporation (San Diego, CA)
Appl. No.: 075936
Filed: January 25, 2002 |
