它们消除疲劳，去除皱纹和岁月痕迹。
They wipe out tight, tired feelings and remove lines and age signs.
模拟陷波器和数字陷波器由于消除工频干扰的同时也去除了信号成分，一般只在简单生物反馈中使用。
However both the analog and digital notch filter removes the signal component when they eliminate the power line interference, so they are only used in simple biofeedback.
利用ICA方法对实测脑电信号中的心电伪迹和工频噪声进行了消除，成功去除噪声并保留脑电信号的特征不变。
ECG artifact and power noise are successfully removed from the origanal EEG signal with the ICA method with no harm to the details of EEG signals.
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