Planar-magnetic speakers with secondary magnetic structure

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic

Reexamination Certificate

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C381S399000, C381S191000

Reexamination Certificate

active

06934402

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.

REFERENCES:
patent: 1799053 (1931-03-01), Mache
patent: 1951669 (1934-03-01), Ramsey
patent: 2461344 (1949-02-01), Olson
patent: 2855467 (1958-10-01), Curry
patent: 2935575 (1960-05-01), Bobb
patent: 2975243 (1961-03-01), Katella
patent: 3008013 (1961-11-01), Williamson et al.
patent: 3012222 (1961-12-01), Hagemann
patent: 3013905 (1961-12-01), Gamzon et al.
patent: 3136867 (1964-06-01), Bretell
patent: 3209084 (1965-09-01), Gamzon et al.
patent: 3345469 (1967-10-01), Rod
patent: 3373251 (1968-03-01), Seeler
patent: 3389226 (1968-06-01), Peabody
patent: 3398810 (1968-08-01), Clark, III
patent: 3674946 (1972-07-01), Winey
patent: 3787642 (1974-01-01), Young, Jr.
patent: 3829623 (1974-08-01), Willis et al.
patent: 3833771 (1974-09-01), Collinson
patent: 3836951 (1974-09-01), Geren et al.
patent: 3873784 (1975-03-01), Doschek
patent: 3892927 (1975-07-01), Lindenberg
patent: 3919499 (1975-11-01), Winey
patent: 3941946 (1976-03-01), Kawakami et al.
patent: 4056742 (1977-11-01), Tibbetts
patent: 4064375 (1977-12-01), Russell et al.
patent: 4160882 (1979-07-01), Driver
patent: 4207571 (1980-06-01), Passey
patent: 4210786 (1980-07-01), Winey
patent: 4245136 (1981-01-01), Krauel, Jr.
patent: 4284921 (1981-08-01), Lemonon et al.
patent: 4295214 (1981-10-01), Thompson
patent: 4338489 (1982-07-01), Gorike
patent: 4378596 (1983-03-01), Clark
patent: 4385210 (1983-05-01), Marquiss
patent: 4418404 (1983-11-01), Gordon et al.
patent: 4419545 (1983-12-01), Kuindersma
patent: 4429193 (1984-01-01), Busch-Vishniac et al.
patent: 4434327 (1984-02-01), Busch-Vishniac et al.
patent: 4439642 (1984-03-01), Reynard
patent: 4468530 (1984-08-01), Torgeson
patent: 4471172 (1984-09-01), Winey
patent: 4480155 (1984-10-01), Winey
patent: 4527017 (1985-07-01), Kopinga et al.
patent: 4558184 (1985-12-01), Busch-Vishniac et al.
patent: 4593160 (1986-06-01), Nakamura
patent: 4593567 (1986-06-01), Isselstein et al.
patent: 4672591 (1987-06-01), Breimesser et al.
patent: 4695986 (1987-09-01), Hossack
patent: 4703509 (1987-10-01), Kanchev
patent: 4751419 (1988-06-01), Takahata
patent: 4803733 (1989-02-01), Carver et al.
patent: 4823908 (1989-04-01), Tanaka et al.
patent: 4885781 (1989-12-01), Seidel
patent: 4887246 (1989-12-01), Hossack et al.
patent: 4888086 (1989-12-01), Hossack et al.
patent: 4903703 (1990-02-01), Igarashi et al.
patent: 4908805 (1990-03-01), Sprenkels et al.
patent: 4939784 (1990-07-01), Bruney
patent: 4991148 (1991-02-01), Gilchrist
patent: 5003609 (1991-03-01), Muraoka
patent: 5003610 (1991-03-01), Adachi et al.
patent: 5054081 (1991-10-01), West
patent: 5142511 (1992-08-01), Kanai et al.
patent: 5153859 (1992-10-01), Chatigny et al.
patent: 5287331 (1994-02-01), Schindel et al.
patent: 5297214 (1994-03-01), Bruney
patent: 5357578 (1994-10-01), Taniishi
patent: 5392358 (1995-02-01), Driver
patent: 5430805 (1995-07-01), Stevenson et al.
patent: 5487114 (1996-01-01), Dinh
patent: 5638456 (1997-06-01), Conley et al.
patent: 5700359 (1997-12-01), Bauer
patent: 5850461 (1998-12-01), Zelinka
patent: 5901235 (1999-05-01), Thigpen et al.
patent: 5953438 (1999-09-01), Stevenson et al.
patent: 5961762 (1999-10-01), Zelinka et al.
patent: 6154557 (2000-11-01), Montour et al.
patent: H2-265400 (1990-10-01), None
patent: WO 01/08449 (2001-02-01), None
patent: WO 01/52437 (2001-07-01), None
Ultrasonic Ranging System by Polaroid Corporation.
Parametric Loudspeaker—Characteristics of Acoustic Field and Suitable Modulation of Carrier Ultrasound, Aoki, Kenichi, Kamakura, Tomoo and Kumamoto, Yoshiro, Electronics and Communications in Japan, Part 3, vol. 74, No. 9, pp. 76-82 (1991).
Parametric Acoustic Nondirectional Radiator, Makarov, et al, Acustica, vol. 77, pp. 240-242 (1992).
The Audio Spotlight: An Application of Nonlinear Interaction of Sound Waves to a New Type of Loudspeaker Design, Yoneyama, et al, J. Acoustical Society of America 73(5), May 1983, pp. 1532-1536.
Electrostatic Loudspeaker Loudspeaker Design and Construction, Chapters 4 and 5, pp. 59-91, Wagner, Ronald, Audio Amateur Press Publishers, 1993.
MMPA. Standard Specifications for Permanent Magnet Materials. MMPA Standard No. 0100-00. 1964.

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