A multifrequency signal collecting system is designed.
设计了一种多频信号采集系统。
The system includes the dual-tone multifrequency signal detection module, the musical sound processing module, the harmonical analysis module of circularity and many other demonstration modules.
系统包括话机按键双音频信号识别、圆轮廓形状误差谐波分析、数字音频效果及原理性演示实验等。
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