Multidriver loudspeaker apparatus with improved crossover filter

Details Multidriver loudspeaker apparatus with improved crossover filter Multidriver loudspeaker apparatus with improved crossover filter

1987-10-13

1988-09-13

Ng, Jin F.

Electrical audio signal processing systems and devices

Including frequency control

Having crossover filter

381100, H04R 314

Patent

active

047714662

ABSTRACT:
A loudspeaker system includes at least two loudspeaker drivers, together with an electrical crossover network having filter circuits with at least two separate mutually exclusive frequency passbands. The filter circuits comprising the crossover network each possess brick-wall amplitude responses, i.e., passbands with very high band-edge amplitude vs. frequency response slops, on the order of 100 dB/octave in the better embodiments. The high passband band-edge slopes, which are realized by the inclusion of transmission zeros in the separate crossover filter transfer functions, takes together with further appropriate crossover filter transfer function synthesis causes the separate loudspeaker drivers comprising the loudspeaker system to function independently of one another in their contribution to total system acoustic output. It is shown that the loudspeaker system permits an accurate approximation to the ideal delay function in acoustic space, while minimizing acoustic wave interference among drivers operating in adjacent frequency band, and also reducing overall system nonlinear distortion.

REFERENCES:
patent: 2612558 (1952-09-01), Klipsch
patent: 3671889 (1972-06-01), Favors
patent: 3931469 (1976-01-01), Elliott et al.
patent: 4039977 (1977-08-01), Schmidt
patent: 4237340 (1980-12-01), Klipsch
patent: 4243840 (1981-01-01), Kates
patent: 4282402 (1981-08-01), Liontonia
patent: 4295006 (1981-10-01), Tanaka et al.
patent: 4315102 (1982-02-01), Eberbach

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