H - Electricity – 04 – R
Patent
H - Electricity
04
R
179/37
H04R 3/14 (2006.01)
Patent
CA 1221312
ABSTRACT OF DISCLOSURE 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 ampliltude responses, i.e., passbands with very high band-edge amplitude vs. frequency response slopes, 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 seprate crossover filter transfer functions, taken 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 bands, and also reducing overall system nonlinear distortion.
459516
Modafferi Acoustical Systems Ltd.
Smart & Biggar
LandOfFree
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