Sound reproduction systems

Details Sound reproduction systems Sound reproduction systems

1977-11-22

1979-04-24

Claffy, Kathleen H.

179 1GP, 179 1G, H04R 500

Patent

active

041513690

ABSTRACT:
A basic decoder designed to feed signals to at least three loudspeakers disposed at respective azimuths around a reference point at equal distances therefrom is modified to make it suitable for feeding loudspeakers at the same azimuths but at non-uniform distances from the reference point. Each output of the basic decoder is subject to a time delay proportional to the difference of time of travel of sound from the first pair of loudspeakers to the reference point and the time of travel of sound from the second pair of loudspeakers to the reference point, divided by the sum of said times of travel to an adder connected between the first velocity signal input and the corresponding high-pass filter.

REFERENCES:
patent: 3710034 (1973-01-01), Murry
patent: 3919480 (1975-11-01), Fukami
patent: 3961276 (1976-06-01), Kurata
patent: 4118599 (1978-10-01), Iwahaka et al.
patent: 4119798 (1978-10-01), Iwahaka

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