The main kinds of noises are summarized, and the methods of canceling 50Hz AC and white noise as well as high amplitude noise are analyzed according to their features in developing TEM instrument.

• 归纳了瞬变电磁法仪器研制中所涉及的几种主要干扰类型。 针对各类噪声的特点 ,分析了5 0Hz工频电噪声、本机噪声及高值噪声的抑制方法。