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- 试用奇阶互补法设计两带滤波器组(高、低通互补),进而实现四带滤波器组;并画出其频响。滤波器设计参数为:Fp=1.7KHz, Fr=2.3KHz, Fs=8KHz, Armin≥70dB。-Try odd order with two complementary methods designed to filter group (high and low pass complementary), thus achieving four-band filter group and draw its