Infinite slope loudspeaker crossover filter

Details Infinite slope loudspeaker crossover filter Infinite slope loudspeaker crossover filter

2006-08-01

2006-08-01

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Including frequency control

Having crossover filter

C381S098000, C381S100000, C381S120000

Reexamination Certificate

active

07085389

ABSTRACT:
An improvement to inventor's prior art loudspeaker crossover filter invention is described. A substantially flat network input-impedance characteristic across the audible frequency range is provided by the addition of at least one series connected constant resistance network at the input terminals of the crossover filter system. By relaxing certain infinite slope filter parameters, more uniform acoustic polar response of the loudspeaker system is obtained. Specifically, infinite slope methods are used for the upper (higher frequency) band-edge of low-pass and band-pass filters, and optionally, for high-pass filters. Infinite slope characteristics, however, are relaxed for the lower frequency slope of band-pass filters and, optionally, for high-pass filters. In addition, the crossover network uses fewer components than infinite slope crossovers of the prior art.

REFERENCES:
patent: 4138594 (1979-02-01), Klipsch
patent: 4237340 (1980-12-01), Klipsch
patent: 4287389 (1981-09-01), Gamble
patent: 4606071 (1986-08-01), White
patent: 4771466 (1988-09-01), Modafferi
patent: 4897879 (1990-01-01), Geluk
patent: 5530770 (1996-06-01), Kim
patent: 5598480 (1997-01-01), Kim
patent: 5937072 (1999-08-01), Combest

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