生物电信号记录中常常受到工频信号的干扰,特别是在ECG记录中,工颇干扰将使P波及QRs和T波产生失真,进而使各波幅度和宽度的计算机辅助测量的可靠性降低.早期一般用低通滤波器(截止频率为60Hz)来消除这种干扰,其虽在某些应用场合是有效的.但要影响信号的高频成份,因此限制了它的应用。本文介绍了两种新的频域处理方法,一种是对60Hz附近的一组频率反复进行乘除 Biofrequency signals are often interfered with in bioelectric signal recording. Especially in ECG recording, interference from workers will distort P and QRs and reduce the reliability of computer aided measurement of amplitude and width of each wave. The early use of low-pass filters (cut-off frequency of 60Hz) to eliminate this interference, although effective in some applications, but to affect the high-frequency components of the signal, thus limiting its application. This article describes two new methods of frequency domain processing, one is the repeated multiplication and division of a group of frequencies around 60Hz