Loudspeaker crossover filter

Electrical audio signal processing systems and devices – Including frequency control – Having crossover filter

Reexamination Certificate

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Details

C381S098000

Reexamination Certificate

active

07991170

ABSTRACT:
A method is provided for computing frequency responses of crossover filters for multi-way loudspeakers. The method prescribes driver coordinates for drivers in the multi-way loudspeaker, prescribes an attenuation function for the sound pressure level at a desired angle, computes the crossover frequencies using a point source model and computes the frequency responses in intervals defined by the crossover frequencies.

REFERENCES:
patent: 5642429 (1997-06-01), Janssen
patent: 6834113 (2004-12-01), Liljehag et al.
patent: 6834114 (2004-12-01), Kobayashi et al.
patent: 7003124 (2006-02-01), Thiel
patent: 2002/0191807 (2002-12-01), Asada et al.
patent: 2003/0021428 (2003-01-01), Abe et al.
Siegfried H. Linkwitz; Active Crossover Networks for Noncoincident Drivers; Jan./Feb. 1976; vol. 24, No. 1.; 7 pages (pp. 2-8).
Joseph A. D'Appolito; A Geometric Approach to Eliminating Lobing Error in Multiway Loudspeakers; Oct. 8-12, 1983; 17 pages.
Brandon Cochenour and David A. Rich; A Virtual Loudspeaker Model to Enable Real-Time Listening Tests in Examining the Audibility of High-Order Crossover Networks; Oct. 10-13, 2003; 13 pages.
Peter L. Schuck and Greg Klowak; Digital FIR Filters for Loudspeaker Crossover Networks; Nov. 3-6, 1988; 32 pages.

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