近年来,人们特别关心环境条件的改善,减低噪声的问题也成了其中的一个研究课题。对于电动机的噪声,人们也从各方面进行了研究。噪声,并非电动机特有的问题,在所有的机械装置中,电动机本身也是产生噪声的发源地之一。因此,人们对电动机噪声的关注也越来越高了。 In recent years, people have been particularly concerned about the improvement of environmental conditions and the problem of noise reduction has also become one of the research topics. For the motor noise, people have also conducted research from all aspects. Noise is not a peculiar issue of motors. In all mechanical devices, the motor itself is also a source of noise. Therefore, people are paying more and more attention to motor noise.