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Dealing with noise and ground

机译：处理噪音和地面

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摘要

Noise is usually considered to be disturbing, irritating, and unwanted sound, and to the electronic technician and engineer, it is considered to be random, with little or no periodicity. This does not completely define noise since there are certain noises that are associated with certain commonplace events such as motor hum, lawn mowers, foot steps on a hard surface, etc. Electronic noise is an unwanted signal. The fact that electronic equipment can be a source of noise is well-known and can cause much difficulty. Many electronic technicians and engineers have, at some time, given considerable thought to noise reduction, and there are some who have not bothered to inquire into the nature of internal generated noise.
机译：通常认为噪声是令人不安的，令人讨厌的声音和有害的声音，对于电子技术人员和工程师而言，噪声是随机的，几乎没有或没有周期性。由于存在某些与某些常见事件相关的噪声，例如马达嗡嗡声，割草机，坚硬表面上的脚步声等，因此，这并不能完全定义噪声。电子噪声是不想要的信号。电子设备可能会成为噪声源这一事实是众所周知的，并且会造成很多困难。某些时候，许多电子技术人员和工程师已经对降低噪音进行了相当多的考虑，并且有些人不愿意去询问内部产生的噪音的性质。

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