Electrical audio signal processing systems and devices – Including frequency control – Having crossover filter
Reexamination Certificate
2011-08-23
2011-08-23
Mei, Xu (Department: 2614)
Electrical audio signal processing systems and devices
Including frequency control
Having crossover filter
C381S059000
Reexamination Certificate
active
08005240
ABSTRACT:
A speaker that includes a pair of spaced-apart, in-plane mounted drivers connected in series to a network for applying the appropriate frequency component of the electrical input drive signal to each of the drivers is disclosed. A frequency dependent shunting network, such as a low pass filter, is applied to one of the drivers so as to gradually mute the one driver as a desired frequency is approached. The result is an aesthetically pleasing speaker that has dual in-plane drivers and that produces superior sound quality throughout the entire frequency range of the speaker, including those ranges in which dual, in plane, drivers tend to acoustically interfere with each other.
REFERENCES:
patent: 3984635 (1976-10-01), Nestorovic et al.
patent: 4233472 (1980-11-01), Kleis
patent: 4897879 (1990-01-01), Geluk
patent: 4991221 (1991-02-01), Rush
patent: 5297212 (1994-03-01), Murayama et al.
patent: 5598480 (1997-01-01), Kim
patent: 5781642 (1998-07-01), Tanaka et al.
patent: 6259799 (2001-07-01), Suzuki et al.
patent: 6381334 (2002-04-01), Alexander
patent: 2005/0226441 (2005-10-01), Tanaka et al.
patent: 2431554 (1976-01-01), None
patent: 10054033 (2002-05-01), None
patent: 03117200 (2001-05-01), None
patent: WO 2004/068897 (2004-08-01), None
patent: WO 99/27433 (2009-06-01), None
International Preliminary Report on Patentability; PCT app. No. PCT/US2005/018140; Nov. 21, 2006; 4 pages.
Notification Concerning Transmittal of International Preliminary Report on Patentability; PCT app. No. PCT/US2005/018140; Nov. 30, 2006; 1 page.
Search/Examination Report dated Dec. 28, 2009 from European Application No. 05754103.9, 3 pages.
International Search Report; PCT app. No. PCT/US05/18140; Jun. 30, 2006; 3 pages.
Written Opinion of the International Searching Authority; PCT app. No. PCT/US05/18140; Jun. 30, 2006; 3 pages.
Notification of Transmittal of International Search Report and Written Opinion; PCT app. No. PCT/US05/18140; Jun. 30, 2006; 1 page.
Anderson Jeffery S.
Linse Jason N.
Kilpatrick Townsend & Stockton LLP
Logitech Europe S.A.
Mei Xu
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