中文说明：本代码分别用Fast ICA和PCA盲分离算法，分离001.wav、007.wav、012.wav三段语音的混合语音和余弦、方波、随机信号的混合信号。附测试语音，直接可执行，分离效果极好。详细注释，对照算法，很快能搞懂。
English Description：
This code uses fast ICA and PCA blind separation algorithm to separate the mixed speech of 001.wav, 007.wav and 012.wav and the mixed signal of cosine, square wave and random signal. With test voice, it can be directly implemented, and the separation effect is excellent. Detailed notes, control algorithm, quickly understand.