在電子學(xué)領(lǐng)域，一種不希望發(fā)生的低頻電流，它干擾所要求的信號。通常這種現象是由于交流供電線(xiàn)路屏蔽不良引起的。
In electronics, undesirable low frequency currents interfering with a desired signal, and usually caused by a poorly screened alternating mains supply.
以低于信號中最高頻率兩倍的頻率進(jìn)行信號取樣時(shí)出現的一種效應，即當由取樣狀態(tài)還原時(shí)，還原后的信號將不再含有原來(lái)信號中的高頻成分，并將顯示出虛假的低頻信號。
An effect that occurs when a signal is sampled at a rate less than twice the highest frequency present in the signal.The subsequent signal recovered from the samples will not contain the high frequency component of the original signal and will display a false low frequency signal.
