NOISE IN INDUCTION-MOTORS - CAUSES AND TREATMENTS

In order to reduce the overall noise level around an induction motor effectively, it is first necessary to understand the motor's many noise sources and how noise is transmitted from the motor. In addition, it must be understood how noise is additive and how the surrounding area will affect the overall noise level. Determining the noise level of a fully loaded motor is especially difficult when the ambient noise is louder than the motor. However, it is possible to estimate when the noise source and associated frequencies are understood. Only then can the proper recommendation be made as to what type of noise treatment, if any, to apply to the motor. Time and effort is better spent treating the equipment that is the primary source of the noise.