Noise in electric machines: a review

Increasing awareness of industrial noise pollution and emerging stricter standards have made noise an important topic of research in electric machines. This work is a state-of-the-art review on the identification of noise sources and techniques to mitigate noise. It points the reader to relevant research in the past on acoustic noise identification and mitigation techniques. The paper also describes the current standards and practices and some of the suggestions in literature to intensify these standards. The paper summarizes the emerging future directions in acoustic noise mitigation studies.