Planar diaphragm acoustic loudspeaker

Details Planar diaphragm acoustic loudspeaker Planar diaphragm acoustic loudspeaker

2011-04-19

2011-04-19

Kuntz, Curtis (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S343000, C381S399000, C381S408000, C381S421000, C381S423000

Reexamination Certificate

active

07929726

ABSTRACT:
A planar diaphragm acoustic loudspeaker having a planar diaphragm biased with a high magnetic flux density magnetic circuit which feeds an acoustic waveguide. The apparatus provides high fidelity and efficient acoustic reproduction of high frequency alternating current signals with a minimum of diaphragm resonance and with a substantially flat electrical input impedance versus frequency. The diaphragm has a substantially uniform drive across an acoustically active portion and is held in three dimensional space whereby any mass or diaphragm resonances are controlled and minimized. The acoustic waveguide mates with said diaphragm and ensures a uniform acoustic phase field and an optimal diaphragm acoustic impedance match with atmosphere.

REFERENCES:
patent: 4276452 (1981-06-01), Suyama et al.
patent: 7020301 (2006-03-01), Koura et al.
HiVi, Inc., S1 2-Way Ribbon Coaxial Mid-Tweeter datasheet found at http://www.swanspeaker.com/product/htm/view.asp?id=315 and dated May 25, 2007.
HiVi, Inc., RT1L Isodynamic Tweeter datasheet found at http://www.swanspeaker.com/product/htm/view.asp?id=226 and dated May 25, 2007.
Genesis Advanced Technologies Ribbon Tweeter technology profile found at http://www.genesisloudspeakers.com/ and dated May 25, 2007.

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