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sound
- 定点分析:已知一个语音信号,数据采样频率为100Hz,试分别绘制N=128点DFT的幅频图和N=1024点DFT幅频图。-Fixed-point analysis: a voice signal is known, the data sampling frequency is 100Hz, try drawing N = 128 points, respectively, DFT amplitude-frequency diagram and N = 1024-point DFT amplitu