Electrical audio signal processing systems and devices – Including phase control
Patent
1983-10-11
1985-07-09
Isen, Forester W.
Electrical audio signal processing systems and devices
Including phase control
381 89, H04R 102
Patent
active
045286914
ABSTRACT:
A control system is provided with an alternating variable delay control arrangement for the control of a push-pull transducer system from an audio input signal source to achieve improved reproduction of high fidelity sound. The push-pull transducer system in one arrangement is of the type including two transducers coaxially disposed relative to each other with each transducer including a cone and an electrically actuated drive arrangement for each cone. The bases of the cones are in facing relationship and arranged to define a chamber therebetween. The control system supplies drive signals to the electrical drive arrangements of each transducer so as to drive the respective cones 180.degree. out of phase relative to each other. Further the control system selectively delays the supplied audio input signal to the electrically actuated drive arrangement corresponding to the cone that is being driven in the direction toward the apex of the cone. The selective delay is accomplished in a predetermined manner based on the time for the sound to travel between the two cones through the medium in the chamber. The delay time is selectively adjustable for compensation of specific cone characteristics, cone mounting, barometric changes etc.
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