Abstract: The premise of vibration and noise reduction in refrigerators is the accurate identification, separation and quantification of noise sources. According to the noise source and transmission path of refrigerator products, the noise source identification technology based on partial coherence method is applied to identify the noise source. Aiming at the noise problem of a refrigerator, a multi-input single-output system model is constructed, and the noise sources with larger contributions are identified by analyzing the partial coherence coefficient between the noise sources. By reducing the noise of the main noise source, the noise reduction of the refrigerator is realized.

Key words: Acoustics, Identification of noise source, Partial coherence analysis, Multiple-input and single-output system