| 摘要 |
PURPOSE:To facilitate easy acoustic correction by connecting a resistance element and an impedance element to the output sides of two electronic volumes having different gain characteristics to the control voltage. CONSTITUTION:Two electronic volumes 5 and 6 have different gain variation characteristics to the control voltage Vc. While an impedance element 8 has the frequency characteristics that increases the impedance of the element 8 in a prescribed low frequency area. The effect of the element 8 is reduced as the gains A and B of both volumes 5 and 6 are closer to each other. Then the frequency characteristics get closer to a flat form. While the effect of the element 8 increases when a difference is produced between both gains A and B. Thus the frequency characteristics are subject to the impedance of the ele ment 8. In such a way, the acoustic correction is facilitated even with use of the electronic volumes. |
