In order to meet the requirements of environmental protection and the special requirements of users, by scientific design and adopting the most advanced technologies, such as acoustics and aerodynamics fields, DINGXIN low noise series generator unit has reduced the noise level between 68dB( a) ~ 75 dB( a) ( by measuring seven meters away from the noise source) , Functions can be divided into the following: Canopy type of the lower noise, movable type of lower noise, and noise reduction in the machine room.